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公制螺纹 G常用规格极限尺寸表

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最小最大最小最大最小最大M3X0.56G2.8742.982.582.6552.4392.62.63M4X0.76G3.8383.9783.4333.5233.223.473.5M5X0.86G4.8264.9764.3614.4564.114.44.43M6X1.06G5.7945.9745.2125.3244.8915.265.29M8X1.256G7.767.9727.0427.166.6197.17.14M10X1.56G9.7329.9688.8628.9948.3448.928.96M12X1.756G11.70111.96610.67910.82910.07210.7510.79M14X2.06G13.68213.96212.50312.66311.79712.5712.62M16X2.06G15.68215.96214.50314.66313.79714.5714.62M18X2.56G17.62317.95816.16416.33415.25216.2416.29M20X2.56G19.62319.95818.16418.33417.25218.2418.29M22X2.56G21.62321.95820.16420.33419.25220.2420.29M24X3.06G23.57723.95221.80322.00320.70421.8921.95M27X3.06G26.57726.95224.80325.00323.70424.8924.95最小最大最小最大最小最大M3X0.356G2.8962.9812.6872.7542.6022.712.73M4X0.56G3.8743.983.583.6553.4393.63.63M5X0.56G4.8744.984.584.6554.4394.64.63M6X0.756G5.8385.9785.3915.4915.1665.425.46M8X0.756G7.8387.9787.3917.4917.1667.427.46M8X1.06G7.7947.9747.2127.3246.8917.267.29M10X0.756G9.8389.9789.3919.4919.1669.429.46M10X1.06G9.7949.9749.2129.3248.8919.269.26M10X1.256G9.769.9729.0429.168.6199.089.12M12X1.06G11.79411.97411.20611.32410.89111.2511.29M12X1.256G11.7611.97211.02811.1610.61911.0811.12M12X1.56G11.73211.96810.85410.99410.34210.9110.95M14X1.06G13.79413.97413.20613.32412.89113.2513.29M14X1.56G13.73213.95812.85412.99412.34412.9112.95M16X1.06G15.79415.97415.20615.32414.89115.2515.29M16X1.56G15.73215.96814.85414.99414.34414.914.95M18X1.06G17.79417.97417.20617.32416.89117.2517.29M18X1.56G17.73217.96816.85416.99416.33416.916.95M18X2.06G17.68217.96216.50316.66315.79716.5816.62M20X1.06G19.79419.97419.20619.32418.89119.2419.29M20X1.56G19.73219.96818.85418.99418.34418.918.95M20X2.06G19.68219.96218.50318.66317.79718.5718.62M22X1.06G21.79421.97421.20621.32420.89121.2421.29M22X1.56G21.73221.96820.85420.99420.34420.9520.9M22X2.06G21.68221.96220.50320.66319.79720.5720.62M24X1.06G23.79423.97423.19923.32422.89123.2323.29M24X1.56G23.73223.96822.84422.99422.34422.8922.95M24X2.06G23.68223.96222.49322.66321.79722.5722.62M27X1.06G26.79426.97426.19926.32425.89126.2326.29M27X1.56G26.73226.96825.84425.99425.34425.8925.95M27X2.06G26.68226.96225.49325.66324.79725.5625.62大径极限中径极限螺胚直径小径max公制外螺纹（6G)常用规格极限尺寸表（粗牙）

公制外螺纹（6G)常用规格极限尺寸表（细牙）公称尺寸螺纹系列代号大径极限中径极限小径max螺胚直径公称尺寸螺纹系列代号

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螺纹加工极限尺寸表

螺纹加工极限尺寸表

公制内螺纹（6H）极限尺寸表

公称直径 螺距 大径 中径 小径 钻头直径

M P Min Max Min Max Min Φ

3 0.5 3.000 2.775 2.675 2.599 2.459 2.5

4 0.7 4.000 3.663 3.545 3.422 3.242 3.3

5 0.8 5.000 4.605 4.480 4.334 4.134 4.2

6 0.75 6.000 5.564 5.513 5.378 5.188 5.2

6 1 6.000 5.500 5.350 5.153 4.917 5.0

8 1 8.000 7.500 7.350 7.153 6.917 7.0

8 1.25 8.000 7.348 7.188 6.912 6.647 6.8

10 1 10.000 9.500 9.350 9.153 9.917 9.0

10 1.25 10.000 9.348 9.188 8.912 8.647 8.7

10 1.5 10.000 9.206 9.026 8.676 8.376 8.5

12 1 12.000 11.510 11.350 11.153 10.917 11.0

12 1.25 12.000 10.7

12 1.5 12.000 11.216 11.026 10.676 10.376 10.5

12 1.75 12.000 11.063 10.863 10.441 10.106 10.2

14 1 14.000 13.510 13.350 13.153 12.917 13.0

14 1.25 14.000 12.7

14 1.5 14.000 13.216 13.026 12.676 12.376 12.5

14 2 14.000 12.913 12.701 12.210 11.835 12.0

16 1 16.000 15.510 15.350 15.153 14.917 15.0

公制美制英制螺纹对照表

公制美制英制螺纹对照表

1 / 13 公制/美制/英制螺纹对照表

A型美制螺纹（UNF）常用规格

外螺纹 螺纹

-4 9/16"-19牙 14.28 13.08

-6 11/16''-16 17.46 16.1

-8 13/16''-16 20.64 19.28

-10 1''-14 25.40 23.57

-12 1(3/16)''-12 30.00 28.32

-16 1(7/16)''-12 36.51 34.67

-20 1(11/16)''-12 42.86 41.02

C型JIC37度美制UNF螺纹常用规格

-4 7/16”-20 11.11 10.03

-5 1/2”-20 12.70 11.32

-6 9/16”-18 14.28 13.08

-8 3/4”-16 19.00 17.68

-10 7/8”-14 22.22 20.68

-12 1(1/16)"-12 26.98 25.15

-16 1(5/16)"-12 33.33 31.5

-20 1(5/8)"-12 41.28 39.44

-24 1(7/8)"-12 47.62 45.8

-32 2(1/2)"-12 63.5 61.67

英制圆柱管螺纹（BSPP）常用规格

-4 1/4”-19 13.157 11.55

-6 3/8”-19 16.662 14.95

-8 1/2”-14 20.955 18.63

-12 3/4”-14 26.441 24.11

公差表-螺纹表

公差表-螺纹表

公差与配合（摘自GB1800～1804－79）

1．基本偏差系列及配合种类

2．标准公差值及孔和轴的极限偏差值

标准公差值(基本尺寸大于6至500mm)

基本尺寸mm 公 差 等 级

IT5 IT6 IT7 IT8 IT9 IT10 IT11 IT12

>6～10

>10～18

>18～30

>30～50

>50～80

>80～120

>120～180

>180～250

>250～315

>315～400

>400～500 6

8

9

11

13

15

18

20

23

25

27 9

11

13

16

19

22

25

29

32

36

40 15

18

21

25

30

35

40

46

52

57

63 22

27

33

39

46

54

63

72

81

89

97 36

43

52

62

74

87

100

115

130

140

155 58

70

84

100

120

140

160

185

210

230

250 90

110

130

160

190

220

250

290

320

360

400 150

180

210

250

300

350

400

460

520

570

630

孔的极限差值（基本尺寸由大于10至315mm） μm

公差带 等 基本尺寸mm 级

>0～18 >18～30 >30～50 >50～80 >80～120 >120～180 >180～250 >250～315

D 8 +77

+50 +98

+65 +119

+80 +146

+100 +174

+120 +208

+145 +242

+170 +271

+190

▼9 +93

+50 +117

+65 +142

+80 +174

+100 +207

+120 +245

+145 +285

+170 +320

+190

公制美制英制螺纹对照表 2

公制美制英制螺纹对照表 2

1 / 13 公制/美制/英制螺纹对照表

A型美制螺纹（UNF）常用规格

外螺纹 螺纹

-4 9/16"-19牙 14.28 13.08

-6 11/16''-16 17.46 16.1

-8 13/16''-16 20.64 19.28

-10 1''-14 25.40 23.57

-12 1(3/16)''-12 30.00 28.32

-16 1(7/16)''-12 36.51 34.67

-20 1(11/16)''-12 42.86 41.02

C型JIC37度美制UNF螺纹常用规格

-4 7/16”-20 11.11 10.03

-5 1/2”-20 12.70 11.32

-6 9/16”-18 14.28 13.08

-8 3/4”-16 19.00 17.68

-10 7/8”-14 22.22 20.68

-12 1(1/16)"-12 26.98 25.15

-16 1(5/16)"-12 33.33 31.5

-20 1(5/8)"-12 41.28 39.44

-24 1(7/8)"-12 47.62 45.8

-32 2(1/2)"-12 63.5 61.67

英制圆柱管螺纹（BSPP）常用规格

-4 1/4”-19 13.157 11.55

-6 3/8”-19 16.662 14.95

-8 1/2”-14 20.955 18.63

-12 3/4”-14 26.441 24.11