吉 事 多 常 用 英 制 螺 牙 规 格 表

英制螺纹标准对照表英制普通螺纹(惠氏螺纹)--小螺纹系列(BA)名义尺寸大径螺距每英寸牙中径小径牙型高底孔直径数牙型代号BA mm mm tpi mm外螺纹H1mmd=D p d2=D2d3No.14BA1No.13BANo.12BA1No.11BANo.10BANo.9BANo.8BANo.7BA2No.6BANo.5BANo.4BANo.3BANo.2BANo.1BANo.0BA615°圆锥管螺纹型式和尺寸根本尺寸大径螺距每英寸牙数中径小径牙型高度圆弧尺底孔尺寸寸螺纹代号英寸mm mm tpi mm外螺纹H1r mmd=D p d2=D2d3R1/161/16＂28R1/81/8＂28R1/41/4＂19R3/83/8＂19R1/21/2＂14R3/43/4＂14R11＂1130 R11/411/4＂11R11/211/2＂11R22＂1156 R21/221/2＂1171R33＂11R44＂11R55＂11136 R66＂11根本尺寸螺纹代号英寸R1/161/16＂R1/81/8＂R1/41/4＂R3/83/8＂R1/21/2＂R3/43/4＂R11＂R11/411/4＂R11/211/2＂R22＂R21/221/2＂R33＂R44＂R55＂R66＂°圆锥管螺纹型式和尺寸大径螺距每英寸牙中径小径牙型高度圆弧尺寸底孔尺数寸mm mm tpi mm外螺纹H1r mm d=D p d2=D2d3282819191414113011111156117111111113611制惠氏螺纹的型式尺寸英制普通螺纹(惠氏螺纹)--粗牙(BSW)名义尺寸大径螺距每英寸牙中径小径牙型高底孔直径数牙型代号Ww mm mm tpi mm外螺纹H1mmd=D p d2=D2d31/16＂BSW603/32＂BSW481/8＂BSW405/32＂BSW323/16＂BSW247/32＂BSW241/4＂BSW205/16＂BSW183/8＂BSW167/16＂BSW141/2＂BSW125/8＂3/4＂7/8＂1＂11/8＂11/4＂13/8＂11/2＂15/8＂13/4＂17/8＂2＂21/4＂21/2＂23/4＂3＂31/4＂31/2＂33/4＂4＂41/4＂41/2＂43/4＂5＂51/4＂51/2＂53/4＂6＂BSW11BSW10BSW9BSW822 BSW7BSW7BSW6BSW6BSW5BSW5BSW41/2BSW41/2BSW450 BSW456 BSW31/2BSW31/268 BSW31/4BSW31/480 BSW3BSW392 BSW27/898 BSW27/8BSW23/4110 BSW23/4BSW25/8BSW25/8BSW21/2BSW21/2141制惠氏螺纹的型式尺寸英制普通螺纹(惠氏螺纹)--粗牙(BSW)名义尺寸大径螺距每英寸牙中径小径牙型高底孔直径数牙型代号Ww mm mm tpi mm外螺纹H1mm d=D p d2=D2d31/16＂BSW603/32＂BSW481/8＂BSW405/32＂BSW323/16＂BSW247/32＂BSW241/4＂BSW205/16＂3/8＂7/16＂1/2＂5/8＂3/4＂7/8＂1＂11/8＂11/4＂13/8＂11/2＂15/8＂13/4＂17/8＂2＂21/4＂21/2＂23/4＂3＂31/4＂31/2＂33/4＂4＂41/4＂41/2＂43/4＂5＂51/4＂51/2＂53/4＂6＂BSW18BSW16BSW14BSW12BSW11BSW10BSW9BSW822 BSW7BSW7BSW6BSW6BSW5BSW5BSW41/2BSW41/2BSW450 BSW456 BSW31/2BSW31/268 BSW31/4BSW31/480 BSW3BSW392 BSW27/898 BSW27/8BSW23/4110 BSW23/4BSW25/8BSW25/8BSW21/2BSW21/2141°圆柱管螺纹的型式和尺寸BritishPipeThread(惠氏管螺纹)--圆柱(BSPP/BSPF)大径螺距每英寸牙中径小径牙型高度底孔尺寸数螺纹代号根本尺寸mm tpi mm外螺纹H1mm mmd=D p d2=D2d3G1/81/8＂28G1/41/4＂19G3/83/8＂1915G1/2 G5/8 G3/4 G7/8 G1G11/8 G11/4 G13/8 G11/2 G13/4 G2G21/4 G21/2 G23/4 G3G31/4 G31/2 G33/4 G4G41/2 G5G51/2 G61/2＂5/8＂3/4＂7/8＂1＂11/8＂11/4＂13/8＂11/2＂13/4＂2＂21/4＂21/2＂23/4＂3＂31/4＂31/2＂33/4＂4＂41/2＂5＂51/2＂6＂1419141414281111351111114511511157116311117911119111111041111123111361111。

最全英制螺纹规格表RC2英⼨锥管螺纹，每英⼨11⽛，螺距=25.4/11即2.309，⽛⾼（深）=2.309×0.64即1.479，锥度是固定的即1：16，R等于1/32乘以长度，1/32意思是，锥螺纹的锥度是1：16 ，单边就是1：32，长度意思是：定位点加有效长度，⽐如我定位3.0，有效长度是12.0，R=1/32 X（3+12）=0.46875英制密封管螺纹的基本尺⼨及其公差配合⽅式英制密封管螺纹有两种配合⽅式：圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合；圆锥内螺纹与圆锥外螺纹组成“锥/锥”配合.欧洲国家主要采⽤“柱/锥”配合螺纹；⽽欧洲以外国家则主要采⽤“柱/锥”配合螺纹.两种螺纹的检验量规存在⼀定不同；⽬前的ISO英制密封管螺纹量规标准（ISO 7-2：2000）是按“柱/锥”配合体系设计的.英制密封管螺纹的完整标记由螺纹特征代号、螺纹尺⼨代号和旋向代号组成.英制密封圆柱内螺纹的特征代号为：RP；英制密封圆锥内螺纹的特征代号为：RC；英制密封圆锥外螺纹的特征代号为：R1（与英制密封圆柱内螺纹配合使⽤）；R2（与英制密封圆锥内螺纹配合使⽤）；左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标.对密封管螺纹，利⽤RP/R1，RC/R2分别表⽰“柱/锥”和“锥/锥”螺纹副.2、⾮密封管螺纹英制⾮密封管的基本尺⼨及其极限偏差标记:英制⾮密封管螺纹的完整标记由螺纹特征代号，螺纹尺⼨代号，中径公差等级代号和旋向代号组成英制⾮密封圆柱螺纹的特征代号为：G对英制⾮密封圆柱内螺纹，其中径公差等级代号省略不标；⽽英制⾮密封圆柱外螺纹的中径公尺等级代号分别为A和B左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标当表⽰英制⾮密封管螺纹的螺纹副时，仅标注外螺纹的标记代号⽰例：尺⼨代号为2的右旋，⾮密封圆柱内螺纹：G2尺⼨代号为3的A级，右旋，⾮密封圆柱外螺纹：G3A尺⼨代号为4的B级，左旋，⾮密封圆柱外螺纹：G4B-LH尺⼨代号为2的右旋，⾮密封圆柱内螺纹与A级圆柱外螺纹组成的螺纹副：G2A加⼯内孔螺纹的是管螺纹丝锥加⼯外螺纹的有板⽛。

英制,公制螺纹对照表.尺寸代号每英寸牙数螺距螺纹直径（in) n p 大径D、d 小径D1、d1 1/16 28 0.907 7.723 6.5611/8 28 0.907 9.728 8.5661/4 19 1.337 13.157 11.4453/8 19 1.337 16.662 14.951/2 14 1.814 20.955 18.6315/8 14 1.814 22.911 20.5873/4 14 1.814 26.441 24.1177/8 14 1.814 30.201 27.8771 11 2.309 33.249 30.2911-1/8 11 2.309 37.897 34.9391-1/4 11 2.309 41.91 38.9521-1/2 11 2.309 47.803 44.8451-3/4 11 2.309 53.746 50.7882 11 2.309 59.614 56.6562-1/4 11 2.309 65.71 62.7522-1/2 11 2.309 75.184 72.2262-3/4 11 2.309 81.534 78.5783 11 2.309 87.884 84.9263-1/2 11 2.309 100.33 97.3724 11 2.309 113.03 110.0725 11 2.309 138.43 135.4726 11 2.309 163.83 160.872注：1in=25.4mm1、用螺纹密封的管螺纹其标记及各种螺纹的特征代号规定如下：Rc—圆锥内螺纹55度Rp—与圆锥外螺纹配合的圆柱内螺纹R—圆锥外螺纹标准规定将螺纹尺寸代号写在特征代号之后，若螺纹为械旋应再加写左旋代号LH，具体示例如下：圆锥内螺纹：Rc1/2左旋圆柱内螺纹：Rp1/2—LH圆柱内螺纹与圆锥外螺纹的配合：Rp2/R2左旋B级外螺纹：G1/2B—LH螺纹副G1/2G1/2A内螺纹：G1/2英制螺纹标准JIS B 0203,JIS B 2301(mm)#0 1.52#1 1.85#2 2.18#3 2.51#4 2.84#5 3.18#6 3.51#7 3.84#8 4.17#10 4.83#12 5.481/4 6.35UNS 是英制普通粗牙螺纹; UNF 是英制航空标示皆将分母为8, 再直接称分子之番号.Ex: 1/8 x 0.50 –PPB: 1 分牙螺丝x 0.50”长, PPBEx: 5/16 x 0.50 –PPB = 2.5/8 x 0.50-PPB : 2 分半牙螺丝x 0.50”长, PPB Ex: 5/32 x 0.50 –PPB =1.25/8 x 0.50-PPB: 1 分2 厘半螺丝x 0.50”长, PP BEx: 1/4 x 0.50-PPB= 2/8 x 0.50-PPB: 2 分牙螺丝x 0.50”长, PPB注: 有时会标示粗牙或细牙.UNF: 细牙 :电子业较常用.UNC:粗牙: 重机械结构较常用.Ex: 3/8 x 0.50 ,UNF –PPB: 3 分细牙螺丝x 0.50”长, PPB.C-2: Length Code:为英寸标示, 须乘以25.40 换算为mm.用扣规量，与公制牙型吻合是公制螺纹，与英制螺纹吻合是英制螺纹。

即1：16，R等于1/32乘以长度，1/32意思是，锥螺纹的锥度是1：16 ，单边就是1：32，长度意思是：定位点加有效长度，比如我定位3.0，有效长度是12.0，R=1/32 X（3+12）=0.46875　1、密封管螺纹（R ） 英制密封管螺纹的基本尺寸及其公差 配合方式 英制密封管螺纹的完整标记由螺纹特征代号、螺纹尺寸代号和旋向代号组成. 英制密封圆柱内螺纹的特征代号为：RP ； 英制密封圆锥内螺纹的特征代号为：RC ； 英制密封圆锥外螺纹的特征代号为：R1（与英制密封圆柱内螺纹配合使用）； R2（与英制密封圆锥内螺纹配合使用）； 英制密封管螺纹有两种配合方式：圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合；圆锥内螺纹与圆锥外螺纹组成“锥/锥”配合. 欧洲国家主要采用“柱/锥”配合螺纹；而欧洲以外国家则主要采用“柱/锥”配合螺纹.两种螺纹的检验量规存在一定不同；目前的ISO 英制密封管螺纹量规标准（ISO 7-2：2000）是按“柱/锥”配合体系设计的. 左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标. 对密封管螺纹，利用RP/R1，RC/R2分别表示“柱/锥” 和“锥/锥”螺纹副. 2、非密封管螺纹 英制非密封管的基本尺寸及其极限偏差 标记: 英制非密封管螺纹的完整标记由螺纹特征代号，螺纹尺寸代号，中径公差等级代号和旋向代号组成. 英制非密封圆柱螺纹的特征代号为：G 对英制非密封圆柱内螺纹，其中径公差等级代号省略不标；而英制非密封圆柱外螺纹的中径公尺等级代号分别为A和B. 左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标. 当表示英制非密封管螺纹的螺纹副时，仅标注外螺纹的标记代号. 示例： 尺寸代号为2的右旋，非密封圆柱内螺纹：G2 尺寸代号为3的A级，右旋，非密封圆柱外螺纹：G3A 尺寸代号为4的B级，左旋，非密封圆柱外螺纹：G4 B-LH 尺寸代号为2的右旋，非密封圆柱内螺纹与A级圆柱外螺纹组成的螺纹副：G2A 加工内孔螺纹的是管螺纹丝锥加工外螺纹的有板牙。

英制螺纹规格表英制螺纹规格表1. 绣针口螺纹：名称 | 尺寸 | 标注---|---|---#0-80 | 0.060”| 0.0625”#1-72 | 0.072” |0.0781”#2-64 | 0.084” |0.0937”#3-56 | 0.096” |0.1094”#4-48 | 0.108” |0.125”绣针口螺纹是一种较小的英制螺纹，常用于较脆弱的零部件，以及限制加工时间的应用中。

它们的最小级别低于3/4-10（与螺纹内径相当），可以满足对强度要求较低的细度和小型精密零部件的螺纹加工需求。

以下是英制绣针口螺纹的一些典型尺寸：#0-80尺寸为0.060英寸，标注为0.0625英寸，#1-72尺寸为0.072英寸，标注为0.0781英寸；#2-64尺寸为0.084英寸，标注为0.0937英寸，#3-56尺寸为0.096英寸，标注为0.1094英寸，#4-48尺寸为0.108英寸，标注为0.125英寸。

2. 英制螺旋槽名称 | 尺寸 | 标注---|---|---8-32 | 0.125” | 0.164”10-24 | 0.190” | 0.213”12-24 | 0.212” | 0.238”1/4-20 | 0.250” | 0.312”5/16-18 | 0.312：| 0.374”英制螺旋槽用于以英制度量标准制造的较大的型号螺丝。

它们鼓励机械强度，防止悬索应力松动。

英制螺旋槽的典型尺寸如下：8-32尺寸为0.125英寸，标注为0.164英寸；10-24尺寸为0.190英寸，标注为0.213英寸；12-24尺寸为0.212英寸，标注为0.238英寸；1/4-20尺寸为0.250英寸，标注为0.312英寸；5/16-18尺寸为0.312英寸，标注为0.374英寸。

3. 英制头螺纹名称 | 尺寸 | 标注---|---|---1/4-18 | 0.250” | 0.269”5/16-16 | 0.312” | 0.328”3/8-16 | 0.375” | 0.391”7/16-14 | 0.438” | 0.453”1/2-13 | 0.500” | 0.514”英制头螺纹是以英制度量标准制造的一种常见的螺纹样式，也称为英制钢制螺母或头螺母。

55°圆柱管螺纹的型式和尺寸RC2英寸锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高（深）=2.309×0.64即1.479，锥度是固定的即1：16R等于1/32乘以长度1/32意思是，锥螺纹的锥度是1：16 ，单边就是1：32长度意思是：定位点加有效长度比如我定位3.0，有效长度是12.0 R=1/32 X （3+12）=0.46875　1、密封管螺纹（R） 英制密封管螺纹的基本尺寸及其公差 配合方式 英制密封管螺纹有两种配合方式：圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合；圆锥内螺纹与圆锥外螺纹组成“锥/锥”配合. 欧洲国家主要采用“柱/锥”配合螺纹；而欧洲以外国家则主要采用“柱/锥”配合螺纹.两种螺纹的检验量规存在一定不同；目前的ISO英制密封管螺纹量规标准（ISO 7-2：2000）是按“柱/锥”配合体系设计的.编辑本段密封管螺纹的标记 英制密封管螺纹的完整标记由螺纹特征代号、螺纹尺寸代号和旋向代号组成. 英制密封圆柱内螺纹的特征代号为：RP； 英制密封圆锥内螺纹的特征代号为：RC； 英制密封圆锥外螺纹的特征代号为：R1（与英制密封圆柱内螺纹配合使用）； R2（与英制密封圆锥内螺纹配合使用）； 左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标. 对密封管螺纹，利用RP/R1，RC/R2分别表示“柱/锥”和“锥/锥”螺纹副. 2、非密封管螺纹 英制非密封管的基本尺寸及其极限偏差 标记: 英制非密封管螺纹的完整标记由螺纹特征代号，螺纹尺寸代号，中径公差等级代号和旋向代号组成. 英制非密封圆柱螺纹的特征代号为：G 对英制非密封圆柱内螺纹，其中径公差等级代号省略不标；而英制非密封圆柱外螺纹的中径公尺等级代号分别为A和B. 左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标. 当表示英制非密封管螺纹的螺纹副时，仅标注外螺纹的标记代号. 示例： 尺寸代号为2的右旋，非密封圆柱内螺纹：G2 尺寸代号为3的A 级，右旋，非密封圆柱外螺纹：G3A 尺寸代号为4的B 级，左旋，非密封圆柱外螺纹：G4B-LH 尺寸代号为2的右旋，非密封圆柱内螺纹与A级圆柱外螺纹组成的螺纹副：G2A 加工内孔螺纹的是管螺纹丝锥加工外螺纹的有板牙。

最大最小最小1最大最小公差范圍最小最大最小最大公差范圍2A 0.00050.05950.0563…0.05140.04960.00180.04462B 0.04650.05140.05190.05420.00230.06003A 0.00000.06000.0568…0.05190.05060.00130.04513B 0.04650.05140.05190.05360.00170.06002A 0.00060.07240.0686…0.06230.06030.00200.05382B 0.05610.06230.06290.06550.00260.07303A 0.00000.07300.0692…0.06290.06140.00150.05443B 0.05610.06230.06290.06480.00190.07302A 0.00060.07240.0689…0.06340.06150.00190.05592B 0.05800.06350.06400.06650.00250.07303A 0.00000.07300.0695…0.06400.06260.00140.05653B 0.05800.06350.06400.06590.00190.07302A 0.00060.08540.0813…0.07380.07170.00210.06422B 0.06670.07370.07440.07720.00280.08603A 0.00000.08600.0819…0.07440.07280.00160.06483B 0.06670.07370.07440.07650.00210.08602A 0.00060.08540.0816…0.07530.07330.00200.06682B 0.06910.07530.07590.07860.00270.08603A 0.00000.08600.0822…0.07590.07440.00150.06743B 0.06910.07530.07590.07790.00200.08602A 0.00070.09830.0938…0.08480.08250.00230.07342B 0.07640.08450.08550.08850.00300.09903A 0.00000.09900.0945…0.08550.08380.00170.07413B 0.07640.08450.08550.08770.00220.09902A 0.00070.09830.0942…0.08670.08450.00220.07712B 0.07970.08650.08740.09020.00280.09903A 0.00000.09900.0949…0.08740.08580.00160.07783B 0.07970.08650.08740.08950.00210.09902A 0.00080.11120.1061…0.09500.09250.00250.08142B 0.08490.09390.09580.09910.00330.11203A 0.00000.11200.1069…0.09580.09390.00190.08223B 0.08490.09390.09580.09820.00240.11202A 0.00070.11130.1068…0.09780.09540.00240.08642B 0.08940.09680.09850.10160.00310.11203A 0.00000.11200.1075…0.09850.09670.00180.08713B 0.08940.09680.09850.10080.00230.11202A 0.00080.12420.1191…0.10800.10540.00260.09442B 0.09790.10620.10880.11210.00330.12503A 0.00000.12500.1199…0.10880.10690.00190.09523B 0.09790.10620.10880.11130.00250.12502A 0.00070.12430.1195…0.10950.10700.00250.09722B 0.10040.10790.11020.11340.00320.12503A 0.00000.12500.1202…0.11020.10830.00190.09793B 0.10040.10790.11020.11260.00240.12502A 0.00080.13720.1312…0.11690.11410.00280.10002B 0.10400.1140.11770.12140.00370.13803A 0.00000.13800.1320…0.11770.11560.00210.10083B 0.10400.11400.11770.12040.00270.13802A 0.00080.13720.1321…0.12100.11840.00260.10742B 0.1110.1190.12180.12520.00340.13803A 0.00000.13800.1329…0.12180.11980.00200.10823B 0.11100.11860.12180.12430.00250.13802A 0.00090.16310.1571…0.14280.13990.00290.12592B 0.1300.1390.14370.14750.00380.16403A 0.00000.16400.1580…0.14370.14150.00220.12683B 0.13000.13890.14370.14650.00280.16402A 0.00080.16320.1577…0.14520.14240.00280.13012B 0.1340.1420.14600.14960.00360.16403A 0.00000.16400.1585…0.14600.14390.00210.13093B0.13400.14160.14600.14870.00270.16404-40/0.112-40UNC 6-32/0.138-32UNC 5-40/0.125-40UNC 5-44/0.125-44UNF 2-64/0.086-64UNF 3-48/0.099-48UNC 3-56/0.099-56UNF 等級角最小2-56/0.086-56UNC 等級允許偏差倒4-48/0.112-48UNF 0-80/0.060-80UNF 1-64/0.073-64UNC 1-72/0.073-72UNF 8-36/0.164-36UNF6-40/0.138-40UNF 8-32/0.164-32UNC最大最小最小1最大最小公差范圍最小最大最小最大公差范圍等級角最小等級允許偏差倒2A 0.00100.18900.1818…0.16190.15860.00330.13942B 0.1450.1560.16290.16720.00430.19003A 0.00000.19000.1828…0.16290.16040.00250.14043B 0.14500.15550.16290.16610.00320.19002A 0.00090.18910.1831…0.16880.16580.00300.15192B 0.1560.1640.16970.17360.00390.19003A 0.00000.19000.1840…0.16970.16740.00230.15283B 0.15600.16410.16970.17260.00290.19002A 0.00100.21500.2078…0.18790.18450.00340.16542B 0.1710.1810.18890.19330.00440.21603A 0.00000.21600.2088…0.18890.18630.00260.16643B 0.17100.18070.18890.19220.00330.21602A 0.00100.21500.2085…0.19180.18860.00320.17242B 0.1770.1860.19280.19700.00420.21603A 0.00000.21600.2095…0.19280.19040.00240.17343B 0.17700.18570.19280.19590.00310.21602A 0.00090.21510.2091…0.19480.19170.00310.17792B 0.1820.1900.19570.19980.00410.21603A 0.00000.21600.2100…0.19570.19330.00240.17883B 0.18200.18950.19570.19880.00310.21601A 0.00110.24890.2367…0.21640.21080.00560.18941B 0.1960.2070.21750.22480.00730.25002A 0.00110.24890.24080.23670.21640.21270.00370.18942B 0.1960.2070.21750.22240.00490.25003A 0.00000.25000.2419…0.21750.21470.00280.19053B 0.19600.20670.21750.22110.00360.25001A 0.00100.24900.2392…0.22580.22080.00500.20641B 0.2110.2200.22680.23330.00650.25002A 0.00100.24900.2425…0.22580.22250.00330.20642B 0.2110.2200.22680.23110.00430.25003A 0.00000.25000.2435…0.22680.22430.00250.20743B 0.21100.21900.22680.23000.00320.25002A 0.00100.24900.2430…0.22870.22550.00320.21182B 0.2160.2240.22970.23390.00420.25003A 0.00000.25000.2440…0.22970.22730.00240.21283B 0.21600.22290.22970.23280.00310.25001A 0.00120.31130.2982…0.27520.26910.00610.24521B 0.2520.2650.27640.28430.00790.31252A 0.00120.31130.30260.29820.27520.27120.00400.24522B 0.2520.2650.27640.28170.00530.31253A 0.00000.31250.3038…0.27640.27340.00300.24643B 0.25200.26300.27640.28030.00390.31252A 0.00120.31130.3032…0.27880.27480.00400.25182B 0.2580.2700.28000.28520.00570.31253A 0.00000.31250.3044…0.28000.27700.00300.25303B 0.25800.26800.28000.28390.00390.31251A 0.00110.31140.3006…0.28430.27880.00550.26181B 0.2670.2770.28540.29250.00710.31252A 0.00110.31140.3042…0.28430.28060.00370.26182B 0.2670.2770.28540.29020.00480.31253A 0.00000.31250.3053…0.28540.28270.00270.26293B 0.26700.27540.28540.28900.00360.31252A 0.00100.31150.3050…0.28830.28490.00340.26892B 0.2740.2820.28930.29370.00440.31253A 0.00000.31250.3060…0.28930.28670.00260.26993B 0.27400.28070.28930.29260.00330.31252A 0.00100.31160.3055…0.29120.28800.00320.27432B 0.2790.2860.29220.29640.00420.31253A 0.00000.31250.3065…0.29220.28980.00240.27533B0.27900.28470.29220.29530.00310.312510-24/0.190-24UNC 12-28/0.216-28UNF 12-32/0.216-32UNEF 10-32/0.190-32UNF 12-24/0.216-24UNC 1/4-32/0.250-32UNEF 5/16-18/0.3125-18UNC 1/4-20/0.250-20UNC1/4-28/0.250-28UNF 5/16-28/0.3125-28UN5/16-32/0.3125-32UNEF5/16-20/0.3125-20UN 5/16-24/0.3125-24UNF最大最小最小1最大最小公差范圍最小最大最小最大公差范圍等級角最小等級允許偏差倒1A 0.00130.37370.3595…0.33310.32660.00650.29921B 0.3070.3210.33440.34290.00850.37502A 0.00130.37370.36430.35950.33310.32870.00440.29922B 0.3070.3210.33440.34010.00570.37503A 0.00000.37500.3656…0.33440.33110.00330.30053B 0.30700.31820.33440.33870.00430.37502A 0.00120.37380.3657…0.34130.33720.00410.31432B 0.3210.3320.34250.34790.00540.37503A 0.00000.37500.3669…0.34250.33940.00310.31553B 0.32100.32970.34250.34650.00400.37501A 0.00110.37390.3631…0.34680.34110.00570.32431B 0.3300.3400.34790.35530.00740.37502A 0.00110.37390.3667…0.34680.34300.00380.32432B 0.3300.3400.34790.35280.00490.37503A 0.00000.37500.3678…0.34790.34500.00290.32543B 0.33000.33720.34790.35160.00370.37502A 0.00110.37390.3674…0.35070.34710.00360.33132B 0.3360.3450.35180.35640.00460.37503A 0.00000.37500.3685…0.35180.34910.00270.33243B 0.33600.34260.35180.35530.00350.37502A 0.00100.37400.3680…0.35370.35030.00340.33682B 0.3410.3490.35470.35910.00440.37503A 0.00000.37500.3690…0.35470.35220.00250.33783B 0.34100.34690.35470.35800.00330.37501A 0.00140.43610.4206…0.38970.38260.00710.35111B 0.3600.3760.39110.40030.00920.43752A 0.00140.43610.42580.42060.38970.38500.00470.35112B 0.3600.3760.39110.39720.00610.43753A 0.00000.43750.4272…0.39110.38760.00350.35253B 0.36000.37170.39110.39570.00460.43752A 0.00140.43610.4267…0.39550.39090.00460.36162B 0.3700.3840.39690.40280.00590.43753A 0.00000.43750.4281…0.39690.39350.00340.36303B 0.37000.38000.39690.40140.00450.43751A 0.00130.43620.4240…0.40370.39750.00620.37671B 0.3830.3950.40500.41310.00810.43752A 0.00130.43620.4281…0.40370.39950.00420.37672B 0.3830.3950.40500.41040.00540.43753A 0.00000.43750.4294…0.40500.40190.00310.37803B 0.38300.39160.40500.40910.00410.43752A 0.00110.43640.4299…0.41320.40960.00360.39382B 0.3990.4070.41430.41890.00460.43753A 0.00000.43760.4310…0.41430.41160.00270.39493B 0.39900.40510.41430.41780.00350.43752A 0.00100.43650.4305…0.41620.41280.00340.39932B 0.4040.4110.41720.42160.00440.43753A 0.00000.43750.4315…0.41720.41470.00250.40033B 0.40400.40940.41720.42050.00330.43751A 0.00150.49850.4822…0.44850.44110.00740.40691B 0.4170.4340.45000.45970.00970.50002A 0.00150.49850.48760.48220.44850.44350.00500.40692B 0.4170.4340.45000.45650.00650.50003A 0.00000.50000.4891…0.45000.44630.00370.40843B 0.41700.42840.45000.45480.00480.50002A 0.00140.49860.4892…0.45800.45330.00470.42412B 0.4320.4460.45940.46550.00610.50003A 0.00000.50000.4906…0.45940.45590.00350.42553B 0.43200.44190.45940.46400.00460.50001A 0.00130.49870.4865…0.46620.45980.00640.43921B 0.4460.4570.46750.47590.00840.50002A 0.00130.49870.4906…0.46620.46190.00430.43922B 0.4460.4570.46750.47310.00560.50003A 0.00000.50000.4919…0.46750.46430.00320.44053B0.44600.45370.46750.47170.00420.50001/2-13/0.500-13UNC 1/2-16/0.500-16UN 1/2-20/0.500-20UNF7/16-20/0.4375-20UNF7/16-28/0.4375-28UNEF 7/16-32/0.4375-32UN 3/8-32/0.375-32UNEF 7/16-14/0.4375-14UNC 7/16-16/0.4375-16UN 3/8-24/0.375-24UNF 3/8-28/0.375-28UN 3/8-16/0.375-16UNC 3/8-20/0.375-20UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍等級角最小等級允許偏差倒2A 0.00110.49890.4924…0.47570.47200.00370.45632B 0.4610.4700.47680.48160.00480.50003A 0.00000.50000.4935…0.47680.47400.00280.45743B 0.46100.46760.47680.48040.00360.50002A 0.00100.49900.4930…0.47870.47520.00350.46182B 0.4660.4740.47970.48420.00450.50003A 0.00000.50000.4940…0.47970.47710.00260.46283B 0.46600.47190.47970.48310.00340.50001A 0.00160.56090.5437…0.50680.49900.00780.46171B 0.4720.4900.50840.51860.01020.56252A 0.00160.56090.54950.54370.50680.50160.00520.46172B 0.4720.4900.50840.51520.00680.56253A 0.00000.56250.5511…0.50840.50450.00390.46333B 0.47200.48430.50840.51350.00510.56252A 0.00140.56110.5517…0.52050.51580.00470.48662B 0.4950.5090.52190.52800.00610.56253A 0.00000.56250.5531…0.52190.51840.00350.48803B 0.49500.50400.52190.52650.00460.56251A 0.00140.56110.5480…0.52500.51820.00680.49501B 0.5020.5150.52640.53530.00890.56252A 0.00140.56110.5524…0.52500.52050.00450.49502B 0.5020.5150.52640.53230.00590.56253A 0.00000.56250.5538…0.52640.52300.00340.49643B 0.50200.51060.52640.53080.00440.56252A 0.00130.56120.5531…0.52870.52450.00420.50172B 0.5080.5200.53000.53550.00550.56253A 0.00000.56260.5544…0.53000.52680.00320.50303B 0.50800.51620.53000.53410.00410.56252A 0.00120.56130.5541…0.53420.53030.00390.51172B 0.5170.5270.53540.54050.00510.56253A 0.00000.56250.5553…0.53540.53250.00290.51293B 0.5170.52440.53540.53920.00380.56252A 0.00110.56140.5549…0.53820.53450.00370.51882B 0.5240.5320.53930.54410.00480.56253A 0.00000.56250.5560…0.53930.53650.00280.51993B 0.52400.53010.53930.54290.00360.56252A 0.00100.56150.5555…0.54120.53770.00350.52432B 0.5290.5360.54220.54670.00450.56253A 0.00000.56250.5565…0.54220.53960.00260.52533B 0.52900.53440.54220.54560.00340.56251A 0.00160.62340.6052…0.56440.55610.00830.51521B 0.5270.5460.56600.57670.01070.62502A 0.00160.62340.61130.60520.56440.55890.00560.51522B 0.5270.5460.56600.57320.00720.62503A 0.00000.62500.6129…0.56600.56190.00410.51683B 0.52700.53910.56600.57140.00540.62502A 0.00160.62340.6120…0.56930.56390.00540.52422B 0.5350.5530.57090.57800.00710.62503A 0.00000.62500.6136…0.57090.56680.00410.52583B 0.53500.54630.57090.57620.00530.62502A 0.00140.63260.6142…0.58300.57820.00480.54912B 0.5570.5710.58440.59060.00620.62503A 0.00000.62500.6156…0.58440.58080.00360.55053B 0.55700.56620.58440.58900.00460.62501A 0.00140.62360.6105…0.58750.58050.00700.55751B 0.5650.5780.58890.59800.00910.62502A 0.00140.62360.6149…0.58750.58280.00470.55752B 0.5650.5780.58890.59490.00600.62503A 0.00000.62500.6163…0.58890.58540.00350.55893B0.5650.57300.58890.59340.00450.62509/16-16/0.5625-16UN 9/16-18/0.5625-18UNF 1/2-28/0.500-28UNEF 1/2-32/0.500-32UN 9/16-12/0.5625-12UNC 9/16-28/0.5625-28UN 9/16-32/0.5625-32UN 9/16-20/0.5625-20UN9/16-24/0.5625-24UNEF 5/8-16/0.625-16UN 5/8-18/0.625-18UNF5/8-11/0.625-11UNC 5/8-12/0.625-12UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍等級角最小等級允許偏差倒2A 0.00130.62370.6156…0.59120.58690.00430.56422B 0.5710.5820.59250.59810.00560.62503A 0.00000.62500.6169…0.59250.58930.00320.56553B 0.57100.57870.59250.59670.00420.62502A 0.00120.62380.6166…0.59670.59270.0040057422B 0.5800.5900.59790.60310.00520.62503A 0.00000.62500.6178…0.59790.59490.00300.57543B 0.58000.58690.59790.60180.00390.62502A 0.00110.62390.6174…0.60070.59690.00380.58132B 0.5860.5950.60180.60670.00490.62503A 0.00000.62500.6185…0.60180.59900.00280.58243B 0.58600.59260.60180.60550.00370.62502A 0.00110.62390.6179…0.60360.60000.00360.58672B 0.5910.5900.60470.60930.00460.62503A 0.00000.62500.6190…0.60470.60200.00270.58783B 0.59100.59690.60470.60820.00350.62502A 0.00160.68590.6745…0.63180.62640.00540.58672B 0.5970.6150.63340.64050.00710.68753A 0.00000.68750.6761…0.63340.62930.00410.58833B 0.5970.60850.63340.63870.00530.68752A 0.00140.68610.6767…0.64550.64070.00480.61162B 0.6200.6340.64690.65310.00620.68753A 0.00000.68750.6781…0.64690.64330.00360.61303B 0.62000.62840.64690.65150.00460.68752A 0.00130.68820.6781…0.65370.64940.00430.62672B 0.6330.6450.65500.66060.00560.68753A 0.00000.68750.6794…0.65500.65180.00320.62803B 0.63300.64120.65500.65920.00420.68752A 0.00120.68630.6791…0.65920.65520.00400.63672B 0.6420.6520.66040.66560.00520.68753A 0.00000.68750.6803…0.66040.65740.00300.63793B 0.64200.64940.66040.66430.00390.68752A 0.00110.68640.6799…0.66320.65940.00380.64382B 0.6490.6570.66430.66920.00490.68753A 0.00000.68750.6810…0.66430.66150.00280.64493B 0.64900.65510.66430.66800.00370.68752A 0.00110.68640.6804…0.66610.66250.00380.64922B 0.6540.6610.66720.67180.00460.68753A 0.00000.68750.6815…0.66720.66450.00270.65033B 0.65400.65940.66720.67070.00350.68751A 0.00180.74820.7288…0.68320.67440.00880.62911B 0.6420.6630.68500.69650.01150.75002A 0.00180.74820.73530.72880.68320.67730.00590.62912B 0.6420.6630.68500.69270.00770.75003A 0.00000.75000.7371…0.68500.68060.00440.63093B 0.64200.65450.68500.69070.00570.75002A 0.00170.74830.7369…0.69420.68870.00550.64912B 0.6600.6780.69590.70310.00720.75003A 0.00000.75000.7386…0.69590.69180.00410.65083B 0.66000.67070.69590.70130.00540.75001A 0.00150.74850.7343…0.70790.70040.00750.67401B 0.6820.6960.70940.71920.00980.75002A 0.00150.74850.7391…0.70790.70290.00500.67402B 0.6820.6960.70940.71590.00650.75003A 0.00000.75000.7406…0.70940.70560.00380.67553B 0.68200.69080.70940.71430.00490.75002A 0.00130.74870.7406…0.71620.71180.00440.68922B 0.6960.7070.71750.72320.00570.75003A 0.00000.75000.7419…0.71750.71420.00330.69053B0.69600.70370.71750.72180.00430.75003/4-20/0.750-20UN3/4-10/0.750-10UNC 3/4-12/0.750-12UN 3/4-16/0.750-16UNF 11/16-24/0.6875-24UNEF 11/16-28/0.6875-28UN 11/16-32/0.6875-32UN 11/16-12/0.6875-12UN 11/16-16/0.6875-16UN 11/16-20/0.6875-20UN5/8-32/0.625-32UN 5/8-28/0.625-28UN 5/8-20/0.625-20UN 5/8-24/0.625-24UNEF最大最小最小1最大最小公差范圍最小最大最小最大公差范圍等級角最小等級允許偏差倒2A 0.00120.74880.7423…0.72560.72180.00380.70622B 0.7110.7200.72680.73180.00500.75003A 0.00000.75000.7435…0.72680.72390.00290.70743B 0.71100.71760.72680.73050.00370.75002A 0.00110.74890.7429…0.72860.72500.00360.71172B 0.7160.7240.72970.73440.00470.75003A 0.00000.75000.7440…0.72970.72700.00270.71283B 0.71600.72190.72970.73330.00360.75002A 0.00170.81080.7994…0.75670.75120.00550.71162B 0.7220.7400.75840.76560.00720.81253A 0.00000.81250.8011…0.75840.75430.00410.71333B 0.72200.73290.75840.76380.00540.81252A 0.00150.81100.8016…0.77040.76550.00490.73652B 0.7450.7590.77190.77820.00630.81253A 0.00000.81250.8031…0.77190.76830.00360.73803B 0.74500.75330.77190.77660.00470.81252A 0.00130.81120.8031…0.77870.77430.00440.75172B 0.7580.7700.78000.78570.00570.81253A 0.00000.81250.8044…0.78000.77670.00330.75303B 0.75800.76620.78000.78430.00430.81252A 0.00120.81130.8048…0.78810.78430.00380.76872B 0.7740.7820.78930.79430.00500.81253A 0.00000.81250.8060…0.78930.78640.00290.76993B 0.77400.78010.78930.79300.00370.81252A 0.00110.81140.8054…0.79110.78750.00360.77422B 0.7790.7860.79220.79690.00470.81253A 0.00000.81250.8065…0.79220.78950.00270.77533B 0.77900.78440.79220.79580.00360.81251A 0.00190.87310.8523…0.80090.79140.00950.74081B 0.7550.7780.80280.81510.01230.87502A 0.00190.87310.85920.85230.80090.79460.00630.74082B 0.7550.7780.80280.81100.00820.87503A 0.00000.87500.8611…0.80280.79810.00470.74273B 0.75500.76810.80280.80890.00610.87502A 0.00170.87330.8619…0.81920.81370.00550.77412B 0.7850.8030.82090.82810.00720.87503A 0.00000.87500.8636…0.82090.81680.00410.77583B 0.78500.79480.82090.82630.00540.87501A 0.00160.87340.8579…0.82700.81890.00810.78841B 0.7980.8140.82860.83920.01060.87502A 0.00160.87340.8631…0.82700.82160.00540.78842B 0.7980.8140.82860.83560.00700.87503A 0.00000.87500.8647…0.82860.82450.00410.79003B 0.79800.80680.82860.83390.00530.87502A 0.00150.87350.8641…0.83290.82800.00490.79002B 0.8070.8210.83440.84070.00630.87503A 0.00000.87500.8656…0.83440.83080.00360.80053B 0.80700.81580.83440.83910.00470.87502A 0.00130.87370.8656…0.84120.83680.00440.81422B 0.8210.8320.84250.84820.00570.87503A 0.00000.87500.8669…0.84250.83920.00330.81553B 0.82100.82870.84250.84680.00430.87502A 0.00120.87380.8673…0.85060.84680.00380.83122B 0.8360.8450.85180.85680.00500.87503A 0.00000.87500.8685…0.85180.84890.00290.83243B 0.83600.84260.85180.85550.00370.87502A 0.00110.87390.8679…0.85360.85000.00360.83672B 0.8410.8490.85470.85940.00470.87503A 0.00000.87500.8690…0.85470.85200.00270.83783B0.84100.84690.85470.85830.00360.87507/8-9/0.875-9UNC 13/16-28/0.8125-28UN 13/16-32/0.8125-32UN 13/16-12/0.8125-12UN 13/16-16/0.8125-16UN13/16-20/0.8125-20UNEF 3/4-28/0.750-28UN 3/4-32/0.750-32UN 7/8-16/0.875-16UN 7/8-20/0.875-20UNEF 7/8-12/0.875-12UN 7/8-14/0.875-14UNF 7/8-28/0.875-28UN 7/8-32/0.875-32UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍等級角最小等級允許偏差倒2A 0.00170.93580.9244…0.88170.87600.00570.83662B 0.8470.8650.88340.89080.00740.93753A 0.00000.93750.9261…0.88340.87930.00410.83833B 0.84700.85750.88340.88890.00550.93752A 0.00150.93600.9266…0.89540.89040.00500.86152B 0.8700.8840.89690.90340.00650.93753A 0.00000.93750.9281…0.89690.89320.00370.86303B 0.87000.87830.89690.90180.00490.93752A 0.00140.93610.9280…0.90360.89910.00450.87662B 0.8830.8950.90500.91090.00590.93753A 0.00000.93750.9294…0.90500.90160.00340.87803B 0.88300.89120.90500.90940.00440.93752A 0.00120.93630.9298…0.91310.90910.00400.89372B 0.8990.9070.91430.91950.00520.93753A 0.00000.93750.9310…0.91430.91130.00300.89493B 0.89900.90510.91430.91820.00390.93752A 0.00110.93640.9304…0.91610.91230.00380.89922B 0.9040.9110.91720.92210.00490.93753A 0.00000.93750.9315…0.91720.91440.00280.90033B 0.90400.90940.91720.92090.00370.93751A 0.00200.99800.9755…0.91680.90670.01010.84921B 0.8650.8900.91880.93200.0132 1.00002A 0.00200.99800.98300.97550.91680.91000.00680.84922B 0.8650.8900.91880.92760.0088 1.00003A 0.0000 1.00000.9850…0.91880.91370.00510.85123B 0.86500.87970.91680.92540.0066 1.00001A 0.00180.99820.9810…0.94410.93530.00880.89901B 0.9100.9280.94590.95730.0114 1.00002A 0.00180.99820.9868…0.94410.93820.00590.89902B 0.9100.9280.94590.95350.0076 1.00003A 0.0000 1.00000.9886…0.94590.94150.00440.90083B 0.91000.91980.94590.95160.0057 1.00001A 0.00170.99830.9828…0.95190.94350.00840.91321B 0.9230.9380.95360.96450.0109 1.00002A 0.00170.99830.9880…0.95190.94630.00560.91322B 0.9230.9380.95360.96090.0073 1.00003A 0.0000 1.00000.9897…0.95360.94940.00420.91493B 0.92300.93160.95360.95900.0054 1.00002A 0.00150.99850.9891…0.95790.95290.00500.92402B 0.9320.9460.95940.96590.0065 1.00003A 0.0000 1.00000.9906…0.95940.95570.00370.92553B 0.93200.94080.95940.96430.0049 1.00002A 0.00140.99860.9905…0.96610.96160.00450.93912B 0.9460.9570.96750.97340.0059 1.00003A 0.0000 1.00000.9919…0.96750.96410.00340.94053B 0.94600.95370.96750.97190.0044 1.00002A 0.00120.99880.9923…0.97560.97160.00400.95622B 0.9610.9700.97680.98200.0052 1.00003A 0.0000 1.00000.9935…0.97680.97380.00300.95743B 0.96100.96760.97680.98070.0039 1.00002A 0.00110.99890.9929…0.97860.97480.00380.96172B 0.9660.9740.97970.98460.0049 1.00003A 0.0000 1.00000.9940…0.97970.97690.00280.96283B 0.96600.97190.97970.98340.0037 1.00002A 0.0020 1.06051.0455…0.97930.97250.00680.91172B 0.9270.9520.98130.99020.0089 1.06253A 0.0000 1.06251.0475…0.98130.97620.00510.91373B0.92700.94220.98130.98800.0067 1.062515/16-12/0.9375-12UN15/16-16/0.9375-16UN15/16-32/0.9375-32UN1-8/1.000-8UNC 15/16-20/0.9375-20UNEF15/16-28/0.9375-28UN1-16/1.000-16UN1-20/1.000-20UNEF1-12/1.000-12UNF 1-14/1.000-14UNS(5)1-1/16-8/1.0625-8UN1-28/1.000-28UN1-32/1.000-32UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍等級角最小等級允許偏差倒2A 0.0017 1.06081.0494… 1.00671.00100.00570.96162B 0.9720.990 1.00841.01580.0074 1.06253A 0.0000 1.06251.0511… 1.00841.00420.00420.96333B 0.97200.98231.00841.01390.0055 1.06252A 0.0015 1.06101.0516… 1.02041.01540.00500.98652B 0.995 1.009 1.02191.02840.0065 1.06253A 0.0000 1.06251.0531… 1.02191.01820.00370.98803B 0.99501.00331.02191.02680.0049 1.06252A 0.0014 1.06111.0524… 1.02501.02030.00470.99502B 1.002 1.015 1.02641.03260.0062 1.06253A 0.0000 1.06251.0538… 1.02641.02280.00360.99643B 1.00201.01051.02641.03100.0046 1.06252A 0.0014 1.06111.0530… 1.02861.02410.0045 1.00162B 1.008 1.020 1.03001.03590.0059 1.06253A 0.0000 1.06251.0544… 1.03001.02660.0034 1.00303B 1.00801.01621.03001.03440.0044 1.06252A 0.0012 1.06131.0548… 1.03811.03410.0040 1.01872B 1.024 1.032 1.03931.04450.0052 1.06253A 0.0000 1.06251.0560… 1.03931.03630.0030 1.01993B 1.02401.03011.03931.04320.0039 1.06251A 0.0022 1.12281.0982… 1.03001.0191 1.01090.95271B 0.9700.998 1.03221.04630.0141 1.12502A 0.0022 1.12281.10641.09821.03001.02280.00720.95272B 0.9700.998 1.03221.04160.0094 1.12503A 0.0000 1.12501.1086… 1.03221.02680.00540.95493B 0.97000.98751.03221.03930.0071 1.12502A 0.0021 1.12291.10791.10041.04171.03480.00690.97412B 0.990 1.015 1.04381.05280.0080 1.12503A 0.0000 1.12501.1100… 1.04381.03860.00520.97623B 0.99001.00471.04381.05050.0067 1.12501A 0.0018 1.12321.1060… 1.06911.06010.0090 1.02401B 1.035 1.053 1.07091.08260.0117 1.12502A 0.0018 1.12321.1118… 1.06911.06310.0060 1.02402B 1.035 1.053 1.07091.07870.0078 1.12503A 0.0000 1.12501.1136… 1.07091.06640.0045 1.02583B 1.03501.04481.07091.07680.0059 1.12502A 0.0015 1.12351.1141… 1.08291.07790.0050 1.04902B 1.057 1.071 1.08441.09090.0065 1.12503A 0.0000 1.12501.1156… 1.08441.08070.00370.05053B 1.05701.06581.08441.08930.0049 1.12502A 0.0014 1.12361.1149… 1.08751.08280.0047 1.05752B 1.065 1.078 1.08891.09510.0062 1.12503A 0.0000 1.12501.1163… 1.08891.08530.0036 1.05893B 1.06501.07301.08891.09350.0046 1.12502A 0.0014 1.12361.1155… 1.09111.08660.0045 1.06412B 1.071 1.082 1.09251.09840.0059 1.12503A 0.0000 1.12501.1169… 1.09251.08910.0034 1.06553B 1.07101.07871.09251.09690.0044 1.12502A 0.0012 1.12381.1173… 1.10061.09660.0040 1.08122B 1.086 1.095 1.10181.10700.0052 1.12503A 0.0000 1.12501.1185… 1.10181.09880.0030 1.08243B 1.08601.09261.10181.10570.0039 1.12502A 0.0021 1.18541.1704… 1.10421.09720.0070 1.03662B 1.052 1.077 1.10631.11540.0091 1.18753A 0.0000 1.18751.1725… 1.10631.10110.0052 1.03873B 1.05201.06721.10631.11310.0068 1.18752A 0.0017 1.18581.1744… 1.13171.12590.0058 1.08662B 1.097 1.115 1.13341.14090.0075 1.18753A 0.0000 1.18751.1761… 1.13341.12910.00431.08833B1.09701.10731.13341.13900.0056 1.18751-1/16-12/1.0625-12UN 1-1/16-20/1.0625-20UN 1-1/16-28/1.0625-28UN 1-1/16-16/1.0625-16UN1-1/16-18/1.0625-18UNEF 1-1/8-12/1.125-12UNF 1-1/8-16/1.125-16UN 1-1/8-7/1.125-7UNC 1-1/8-8/1.125-8UN 1-1/8-28/1.125-28UN 1-3/16-8/1.1875-8UN 1-1/8-18/1.125-18UNEF 1-1/8-20/1.125-20UN 1-3/16-12/1.1875-12UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍等級角最小等級允許偏差倒2A 0.0015 1.18601.1766… 1.14541.14030.0051 1.11152B 1.120 1.134 1.14691.15350.0066 1.18753A 0.0000 1.18751.1781… 1.14691.14310.0038 1.11303B 1.12001.12831.14691.15190.0050 1.18752A 0.0015 1.18601.1773… 1.14991.14500.0049 1.11992B 1.127 1.140 1.15141.15770.0063 1.18753A 0.0000 1.18751.1788… 1.15141.14780.0036 1.12143B 1.12701.13551.15141.15610.0047 1.18752A 0.0014 1.18611.1780… 1.15361.14890.0047 1.12662B 1.133 1.145 1.15501.16110.0061 1.18753A 0.0000 1.18751.1794… 1.15501.15150.0035 1.12803B 1.13301.14121.15501.15950.0045 1.18752A 0.0012 1.18631.1798… 1.16311.15900.0041 1.14372B 1.149 1.157 1.16431.16960.0053 1.18753A 0.0000 1.18751.1810… 1.16431.16120.0031 1.14493B 1.14901.15511.16431.16830.0040 1.18751A 0.0022 1.24781.2232… 1.15501.14390.0111 1.07771B 1.095 1.123 1.15721.17160.0144 1.25002A 0.0022 1.24781.23141.22321.15501.14760.0074 1.07772B 1.095 1.123 1.15721.16680.0096 1.25003A 0.0000 1.25001.2336… 1.15721.15170.0055 1.07993B 1.09501.11251.15721.16440.0072 1.25002A 0.0021 1.24791.23291.22541.16671.15970.0070 1.09912B 1.115 1.140 1.16881.17800.0092 1.25003A 0.0000 1.25001.2350… 1.16881.16350.0053 1.10123B 1.11501.12971.16881.17570.0069 1.25001A 0.0018 1.24821.2310… 1.19411.18490.0092 1.14901B 1.160 1.178 1.19591.20790.0120 1.25002A 0.0018 1.24821.2368… 1.19411.18790.0062 1.14902B 1.160 1.178 1.19591.20390.0080 1.25003A 0.0000 1.25001.2386… 1.19591.19130.0046 1.15083B 1.16001.16981.19591.20190.0060 1.25002A 0.0015 1.24851.2391… 1.20791.20280.0051 1.17402B 1.182 1.196 1.20941.21600.0066 1.25003A 0.0000 1.25001.2406… 1.20941.20560.0038 1.17553B 1.18201.19081.20941.21440.0050 1.25002A 0.0015 1.24851.2398… 1.21241.20750.0049 1.18242B 1.190 1.203 1.21391.22020.0063 1.25003A 0.0000 1.25001.2413… 1.21391.21030.0036 1.18393B 1.19001.19801.21391.21860.0047 1.25002A 0.0014 1.24861.2405… 1.21611.21140.0047 1.18912B 1.196 1.207 1.21751.22360.0061 1.25003A 0.0000 1.25001.2419… 1.21751.21400.0035 1.19053B 1.19601.20371.21751.22200.0045 1.25002A 0.0012 1.24881.2423… 1.22561.22150.0041 1.20622B 1.211 1.220 1.22681.23210.0053 1.25003A 0.0000 1.25001.2435… 1.22681.22370.0031 1.20743B 1.21101.21761.22681.23080.0040 1.25002A 0.0021 1.31041.2954… 1.22921.22210.0071 1.16162B 1.177 1.202 1.23131.24050.0092 1.31253A 0.0000 1.31251.2975… 1.23131.22600.0053 1.16373B 1.17701.19221.23131.23820.0069 1.31252A 0.0017 1.31081.2994… 1.25671.25090.0058 1.21162B 1.222 1.240 1.25841.26590.0075 1.31253A 0.0000 1.31251.3011… 1.25841.25410.0043 1.21333B 1.22201.23231.25841.26400.0056 1.31252A 0.0015 1.31101.3016… 1.27041.26530.0051 1.23652B 1.245 1.259 1.27191.27850.0066 1.31253A 0.0000 1.31251.3031… 1.27191.26810.00381.23803B1.24501.25331.27191.27690.0050 1.31251-3/16-18/1.1875-18UNEF 1-3/16-20/1.1875-20UN 1-3/16-16/1.1875-16UN1-1/4-8/1.250-8UN 1-1/4-12/1.250-12UNF 1-3/16-28/1.1875-28UN 1-1/4-7/1.250-7UNC 1-1/4-20/1.250-20UN 1-1/4-28/1.250-28UN 1-1/4-16/1.250-16UN 1-1/4-18/1.250-18UNEF 1-5/16-16/1.3125-16UN1-5/16-8/1.3125-8UN 1-5/16-12/1.3125-12UN最大最小最小1最大最小公差范圍最小最大最小最大公差范圍等級角最小等級允許偏差倒2A 0.0015 1.31101.3023… 1.27491.27000.0049 1.24492B 1.252 1.265 1.27641.28270.0063 1.31253A 0.0000 1.31251.3038… 1.27641.27280.0036 1.24643B 1.25201.26051.27641.28110.0047 1.31252A 0.0014 1.31111.3030… 1.27861.27390.0047 1.25162B 1.258 1.270 1.28001.28610.0061 1.31253A 0.0000 1.31251.3044… 1.28001.27650.0035 1.25303B 1.25801.26621.28001.28450.0045 1.31252A 0.0012 1.31131.3048… 1.28811.28400.0041 1.26872B 1.274 1.282 1.28931.29460.0053 1.31253A 0.0000 1.31251.3060… 1.28931.28620.0031 1.26993B 1.27401.28011.28931.29330.0040 1.31251A 0.0024 1.37261.3453… 1.26431.25230.0120 1.17421B 1.195 1.225 1.26671.28220.0155 1.37502A 0.0024 1.37261.35441.34531.26431.25630.0080 1.17422B 1.195 1.225 1.26671.27710.0104 1.37503A 0.0000 1.37501.3568… 1.26671.26070.0060 1.17663B 1.19501.21461.26671.27450.0078 1.37502A 0.0022 1.37281.35781.35031.29161.28440.0072 1.22402B 1.240 1.265 1.29381.30310.0093 1.37503A 0.0000 1.37501.3600… 1.29381.28840.0054 1.22623B 1.24001.25471.29381.30080.0070 1.37501A 0.0019 1.37311.3559… 1.31901.30960.0094 1.27391B 1.285 1.303 1.32091.33320.0123 1.37502A 0.0019 1.37311.3617… 1.31901.31270.0063 1.27392B 1.285 1.303 1.32091.32910.0082 1.37503A 0.0000 1.37501.3636… 1.32091.31620.0047 1.27583B 1.28501.29481.32091.32700.0061 1.37502A 0.0015 1.37351.3641… 1.33291.32780.0051 1.29902B 1.307 1.321 1.33441.34100.0066 1.37503A 0.0000 1.37501.3656… 1.33441.33060.0038 1.30053B 1.30701.31581.33441.33940.0050 1.37502A 0.0015 1.37351.3648… 1.33741.33250.0049 1.30742B 1.315 1.328 1.33891.34520.0063 1.37503A 0.0000 1.37501.3663… 1.33891.33530.0036 1.30893B 1.31501.32301.33891.34360.0047 1.37502A 0.0014 1.37361.3655… 1.34111.33640.0047 1.31412B 1.321 1.332 1.34251.34860.0061 1.37503A 0.0000 1.37501.3669… 1.34251.33900.0035 1.31553B 1.32101.32871.34251.34700.0045 1.37502A 0.0012 1.37381.3673… 1.35061.34650.0041 1.33122B 1.336 1.345 1.35181.35710.0053 1.37503A 0.0000 1.37501.3685… 1.35181.34870.0031 1.33243B 1.33601.34261.35181.35580.0040 1.37502A 0.0024 1.43511.4169… 1.32681.31880.0080 1.23672B 1.257 1.288 1.32921.33960.0104 1.43753A 0.0000 1.43751.4193… 1.32921.32320.0060 1.23913B 1.25701.27711.32921.33700.0078 1.43752A 0.0022 1.43531.4203… 1.35411.34690.0072 1.28652B 1.302 1.327 1.35631.36570.0094 1.43753A 0.0000 1.43751.4225… 1.35631.35090.0054 1.28873B 1.30201.31721.35631.36340.0071 1.43752A 0.0018 1.43571.4243… 1.38161.37570.0059 1.33652B 1.347 1.365 1.38341.39100.0076 1.43753A 0.0000 1.43751.4261… 1.38341.37900.0044 1.33833B 1.34701.35731.38341.38910.0057 1.43752A 0.0016 1.43591.4265… 1.39531.39010.0052 1.36142B 1.370 1.384 1.39691.40370.0068 1.43753A 0.0000 1.43751.4281… 1.39691.39300.00391.36303B1.37001.37831.39691.40200.0051 1.43751-5/16-28/1.3125-28UN 1-5/16-18/1.3125-18UNEF 1-5/16-20/1.3125-20UN 1-3/8-6/1.375-6UNC 1-3/8-8/1.375-8UN 1-3/8-28/1.375-28UN 1-3/8-12/1.375-12UNF 1-3/8-16/1.375-16UN 1-7/16-8/1.4375-8UN 1-3/8-18/1.375-18UNEF 1-3/8-20/1.375-20UN 1-7/16-6/1.4375-6UN 1-7/16-12/1.4375-12UN 1-7/16-16/1.4375-16UN。

55°圆柱管螺纹的型式和尺寸RC2英寸锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高（深）=2.309×0.64即1.479，锥度是固定的即1：16R等于1/32乘以长度1/32意思是，锥螺纹的锥度是1：16 ，单边就是1：32长度意思是：定位点加有效长度比如我定位3.0，有效长度是12.0 R=1/32 X （3+12）=0.46875　1、密封管螺纹（R） 英制密封管螺纹的基本尺寸及其公差 配合方式 英制密封管螺纹有两种配合方式：圆柱内螺纹与圆锥外螺纹组成“柱/锥”配合；圆锥内螺纹与圆锥外螺纹组成“锥/锥”配合. 欧洲国家主要采用“柱/锥”配合螺纹；而欧洲以外国家则主要采用“柱/锥”配合螺纹.两种螺纹的检验量规存在一定不同；目前的ISO英制密封管螺纹量规标准（ISO 7-2：2000）是按“柱/锥”配合体系设计的.编辑本段密封管螺纹的标记 英制密封管螺纹的完整标记由螺纹特征代号、螺纹尺寸代号和旋向代号组成. 英制密封圆柱内螺纹的特征代号为：RP； 英制密封圆锥内螺纹的特征代号为：RC； 英制密封圆锥外螺纹的特征代号为：R1（与英制密封圆柱内螺纹配合使用）； R2（与英制密封圆锥内螺纹配合使用）； 左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标. 对密封管螺纹，利用RP/R1，RC/R2分别表示“柱/锥”和“锥/锥”螺纹副. 2、非密封管螺纹 英制非密封管的基本尺寸及其极限偏差 标记: 英制非密封管螺纹的完整标记由螺纹特征代号，螺纹尺寸代号，中径公差等级代号和旋向代号组成. 英制非密封圆柱螺纹的特征代号为：G 对英制非密封圆柱内螺纹，其中径公差等级代号省略不标；而英制非密封圆柱外螺纹的中径公尺等级代号分别为A和B. 左旋螺纹的旋向代号为LH；右旋螺纹的旋向代号省略不标. 当表示英制非密封管螺纹的螺纹副时，仅标注外螺纹的标记代号. 示例： 尺寸代号为2的右旋，非密封圆柱内螺纹：G2 尺寸代号为3的A 级，右旋，非密封圆柱外螺纹：G3A 尺寸代号为4的B 级，左旋，非密封圆柱外螺纹：G4B-LH 尺寸代号为2的右旋，非密封圆柱内螺纹与A级圆柱外螺纹组成的螺纹副：G2A 加工内孔螺纹的是管螺纹丝锥加工外螺纹的有板牙。