当前位置：文档之家 › 美制螺纹标准大全

美制螺纹标准大全

  • 格式：xls
  • 大小：48.00 KB
  • 文档页数：6

Maxb Min

MindMaxh MinMin

0-80 UNF2A0.00050.05950.05630.05140.04960.04462B0.0465

3A00.060.05680.05190.05060.04513B0.0465

1-64 UNC2A0.00060.07240.06860.06230.06030.05382B0.0561

3A00.0730.06920.06290.06140.05443B0.0561

1-72 UNF2A0.00060.07240.06890.06340.06150.05592B0.058

3A00.0730.06950.0640.06260.05653B0.058

2-56 UNC2A0.00060.08540.08130.07380.07170.06422B0.0667

3A00.0860.08190.07440.07280.06483B0.0667

2-64 UNF2A0.00060.08540.08160.07530.07330.06682B0.0691

3A00.0860.08220.07590.07440.06743B0.0691

3-48 UNC2A0.00070.09830.09380.08480.08250.07342B0.0764

3A00.0990.09450.08550.08380.07413B0.0764

3-56 UNF2A0.00070.09830.09420.08670.08450.07712B0.0797

3A00.0990.09490.08740.08580.07783B0.0797

4-40 UNC2A0.00080.11120.10610.0950.09250.08142B0.0849

3A00.1120.10690.09580.09390.08223B0.0849

4-48 UNF2A0.00070.11130.10680.09780.09540.08642B0.0894

3A00.1120.10750.09850.09670.08713B0.0894

5-40 UNC2A0.00080.12420.11910.1080.10540.09442B0.0979

3A00.1250.11990.10880.10690.09523B0.0979

5-44 UNF2A0.00070.12430.11950.10950.1070.09722B0.1004

3A00.1250.12020.11020.10830.09793B0.1004

6-32 UNC2A0.00080.13720.13120.11690.11410.12B0.104

3A00.1380.1320.11770.11560.10083B0.104

6-40 UNF2A0.00080.13720.13210.1210.11840.10742B0.111

3A00.1380.13290.12180.11980.10823B0.111

8-32 UNC2A0.00090.16310.15710.14280.13990.12592B0.13

3A00.1640.1580.14370.14150.12683B0.13

8-36 UNF2A0.00080.16320.15770.14520.14240.13012B0.134

3A00.1640.15850.1460.14390.13093B0.134

10-24 UNC2A0.0010.1890.18180.16190.15860.13942B0.145

3A00.190.18280.16290.16040.14043B0.145

10-28 UNS2A0.0010.1890.18250.16580.16250.14642B0.151

10-32 UNF2A0.00090.18910.18310.16880.16580.15192B0.156

3A00.190.1840.16970.16740.15283B0.156

10-36 UNS2A0.00090.18910.18360.17110.16810.1562B0.16

10-40 UNS2A0.00090.18910.1840.17290.170.15922B0.163

10-48 UNS2A0.00080.18920.18470.17570.17310.16442B0.167

10-56 UNS2A0.00070.18930.18520.17770.17520.16812B0.171

12-24 UNC2A0.0010.2150.20780.18790.18450.16542B0.171小径UNRMinor

Diam.a

Max(Ref.)级别Class外螺纹 External内螺纹 Internal美制螺纹标准大全

NominalSine,Threadsper Inch,andSeriesDesignation大径Major Diameter小径MinorDiameter级别Class公差Allowance中径PitchDiameter

第 1 页，共 6 页2022/2/24

Maxb Min

MindMaxh MinMin小径UNRMinor

Diam.a

Max(Ref.)级别Class外螺纹 External内螺纹 InternalNominalSine,Threadsper Inch,andSeriesDesignation大径Major Diameter小径MinorDiameter级别Class公差Allowance中径PitchDiameter

3A00.2160.20880.18890.18630.16643B0.171

12-28 UNF2A0.0010.2150.20850.19180.18860.17242B0.177

3A00.2160.20950.19280.19040.17343B0.177

12-32 UNEF2A0.00090.21510.20910.19480.19170.17792B0.182

3A00.2160.210.19570.19330.17883B0.182

12-36 UNS2A0.00090.21510.20960.19710.19410.18212B0.186

12-40 UNS2A0.00090.21510.210.19890.1960.18352B0.189

12-48 UNS2A0.00080.21520.21070.20170.19910.19042B0.193

12-56 UNS2A0.00070.21530.21120.20370.20120.19412B0.197

1A0.00110.24890.23670.21640.21080.18941B0.196

1/4-20 UNC2A0.00110.24890.24080.2370.21640.21270.18942B0.196

3A00.250.24190.21750.21470.19053B0.196

1/4-24 UNS2A0.00110.24890.24170.22180.21810.19932B0.205

1/4-27 UNS2A0.0010.2490.24230.22490.22140.20492B0.21

1A0.0010.2490.23920.22580.22080.20641B0.211

1/4-28 UNF2A0.0010.2490.24250.22580.22250.20642B0.211

3A00.250.24350.22680.22430.20743B0.211

1/4-32 UNEF2A0.0010.2490.2430.22870.22550.21182B0.216

3A00.250.2440.22970.22730.21283B0.216

1/4-36 UNS2A0.00090.24910.24360.23110.2280.21612B0.22

1/4-40 UNS2A0.00090.24910.2440.23290.230.21932B0.223

1/4-48 UNS2A0.00080.24920.24470.23570.2330.22432B0.227

1/4-56 UNS2A0.00080.24920.24510.23760.2350.2282B0.231

1A0.00120.31130.29820.27520.26910.24521B0.252

5/16-18 UNC2A0.00120.31130.30260.2980.27520.27120.24522B0.252

3A00.31250.30380.27640.27340.24643B0.252

5/16-20 UN2A0.00120.31130.30320.27880.27480.25182B0.258

3A00.31250.30440.280.2770.2533B0.258

1A0.00110.31140.30060.28430.27880.26181B0.267

5/16-24 UNF2A0.00110.31140.30420.28430.28060.26182B0.267

3A00.31250.30530.28540.28270.26293B0.267

5/16-27 UNS2A0.0010.31150.30480.28740.28390.26742B0.272

5/16-28 UN2A0.0010.31150.3050.28830.28490.26892B0.274

3A00.31250.3060.28930.28670.26993B0.274

5/16-32UNEF2A0.0010.31150.30550.29120.2880.27432B0.279

3A00.31250.30650.29220.28980.27533B0.279

5/16-36 UNS2A0.00090.31160.30610.29360.29050.27852B0.282

5/16-40 UNS2A0.00090.31160.30650.29540.29250.28182B0.285

5/16-48 UNS2A0.00080.31170.30720.29820.29550.28692B0.29

1A0.00130.37370.35950.33310.32660.29921B0.307

第 2 页，共 6 页2022/2/24

合集下载

美制螺纹尺寸

美制螺纹尺寸

美制螺纹尺寸,美制螺纹尺寸表

美制粗牙螺纹(NRT)

(单位：mm)

螺纹尺寸 2B级螺纹用下孔径 3B级螺纹用下孔径

RH

精 度 最小～最大

(嵌合率％) RH

精 度 最小～最大

(嵌合率％)

NO. 2-56UNC 4 1.96 ~ 2.02 (100~65) 3 1.95 ~ 2.01 (100~65)

3-48 4 2.25 ~ 2.32 (100~65) 3 2.23 ~ 2.31 (100~65)

4-40 5 2.52 ~ 2.60 (100~70) 3 2.50 ~ 2.58 (100~70)

5-40 5 2.86 ~ 2.93 (100~70) 3 2.83 ~ 2.91 (100~70)

6-32 5 3.09 ~ 3.17 (100~75) 3 3.06 ~ 3.14 (100~75)

8-32 6 3.75 ~ 3.83 (100~75) 4 3.74 ~ 3.82 (100~75)

10-24 6 4.26 ~ 4.35 (100~80) 4 4.24 ~ 4.32 (100~80)

12-24 6 4.92 ~ 5.01 (100~80) 4 4.90 ~ 4.96 (100~85)

1/4 -20 6 5.66 ~ 5.76 (100~80) 4 5.64 ~ 5.74 (100~80)

5/16 -18 7 7.18 ~ 7.29 (100~80) 5 7.15 ~ 7.24 (100~85)

3/8 -16 7 8.66 ~ 8.78 (100~80) 5 8.63 ~ 8.73 (100~85)

7/16 -14 7 10.11 ~10.25 (100~80) 5 10.08 ~10.19 (100~85)

1/2 -13 8 10.62 ~11.78 (100~80) 6 11.60 ~11.68 (100~90)

美制统一螺纹表UNC,UNF

美制统一螺纹表UNC,UNF

中经公差容隙 es基本大经D，d(内)小径D1(外)小径d3螺距P2A1A和2A

00.060080UNF0.05190.04650.04471.52401.18031.13450.31750.0017620.000529

10.073064UNC0.06290.05610.05381.85421.42461.42460.39690.0019700.000591

10.073072UNF0.06400.05800.05601.85421.47231.47230.35280.0018990.000570

20.086056UNC0.07440.06670.06412.18441.69341.69340.45360.0021270.000638

20.086064UNF0.07590.06910.06682.18441.75481.75480.39690.0020400.000612

30.099048UNC0.08550.07640.07342.51461.94181.94180.52920.0023020.000691

30.099056UNF0.08740.07970.07712.51462.02362.02360.45360.0021910.000657

40.112040UNC0.09580.08490.08132.84482.15742.15740.63500.0025070.000752

40.112048UNF0.09850.08940.08642.84482.27202.27200.52920.0023610.000708

50.125040UNC0.10880.09790.09433.17502.48762.48760.63500.0025620.000769

50.125044UNF0.11020.10040.09713.17502.55012.55010.57730.0024840.000745

60.138032UNC0.11770.10420.09973.50522.64592.64590.79380.0028200.000846

美制螺纹标准对照表

美制螺纹标准对照表

美制螺纹标准对照表

美制外螺纹（2A）常用规格极限尺寸表（粗牙）

公称尺寸和每英寸牙数 螺纹系列代号 大径极限 中径极限 小径max 螺胚直径

最小 最大 最小 最大 最小 最大

8-32

UNC 0.1571 0.1631 0.1399 0.1428 0.1248 3.58 3.61 (0.164-32) 3.9903 4.1427 3.5535 3.6271 3.1699

10-24 0.1818 0.1890 0.1586 0.1619 0.1379 4.07 4.10 (0.190-24) 4.6177 4.8006 4.0284 4.1123 3.5027

12-24 0.2078 0.2150 0.1845 0.1879 0.1639 4.72 4.75 (0.216-24) 5.2781 5.4610 4.6863 4.7727 4.1631

1/4-20 0.2408 0.2489 0.2127 0.2164 0.1876 5.45 5.48 (0.250-20) 6.1163 6.3221 5.4026 5.4966 4.7650

5/16-18 0.3026 0.3113 0.2712 0.2752 0.2431 6.94 6.98 (0.3175-18) 7.6860 7.9070 6.8885 6.9901 6.1747

3/8-16 0.3643 0.3737 0.3287 0.3331 0.2970 8.40 8.44 (0.375-16) 9.2532 9.4920 8.3490 8.4607 7.5438

7/16-14 0.4258 0.4361 0.3850 0.3897 0.3485 9.83 9.87 (0.4375-14) 10.8153 11.0769 9.7790 9.8984 8.8519

1/2-13 0.4876 0.4985 0.4435 0.4485 0.4041 11.34 11.38 (0.50-13) 12.3850 12.6619 11.2649 11.3919 10.2641

美制外螺纹常用规格尺寸表

美制外螺纹常用规格尺寸表

美制外螺纹（2A）常用规格极限尺寸表（粗牙）

公称尺寸和每英寸牙数 螺纹系列代号 大径极限 中径极限

小径max 螺胚直径

最小 最大 最小 最大 最小 最大

8-32

UNC

10-24

12-24

1/4-20

5/16-18

3/8-16

7/16-14

1/2-13

9/16-12

5/8-11

3/4-10

7/8-9

1"-8

1.螺胚直径指滚丝前的尺寸，数值为依经验公式计算而得，在实践中需验证。

2.标记示例：10-24UNC-2A(或、3/8-16UNC-2A(或

（注：表中上行斜体数值单位为英寸，下行乘为毫米）

美制外螺纹（2A）常用规格极限尺寸表（细牙）

公称尺寸和每英寸牙数 螺纹系列代号 大径极限 中径极限

小径max 螺胚直径

最小 最大 最小 最大 最小 最大

8-36

UNF

10-32

12-28

1/4-28

5/16-24

3/8-24

7/16-20

1/2-20

9/16-18

5/8-18

3/4-16

7/8-14

1"-12

1.螺胚直径指滚丝前的尺寸，数值为依经验公式计算而得，在实践中需验证。

2.标记示例：10-32UNF-2A(或、3/8-24UNF-2A(或