【#文档大全网# 导语】以下是®文档大全网的小编为您整理的《螺纹尺寸和公差》，欢迎阅读！
M米制粗牙螺纹基本牙型与尺寸和公差带
代号（大径）
螺 距
螺纹中径
外螺纹小径
内螺纹小径
外 螺 纹 全 齿 高
螺纹中径尺寸
配合齿高
（6H公差带级别）
丝锥螺纹中径 (H2公差带级别为例)
d = D M3 M3.5 M4 M5 M6 M7 M8 M10 M12 M14 M16 M18 M20 M22
P
0.5 0.6 0.7 0.8 1.0 1.0 1.25 1.5 1.75 2.0 2.0 2.5 2.5 2.5
d2 = D2 2.672 3.110 3.545 4.480 5.350 6.350 7.188 9.026 10.863 12.701 14.701 16.373 18.376 20.376
d1 2.387 2.764 3.141 4.019 4.773 5.773 6.466 8.160 9.853 11.546 13.546 14.933 16.933 18.933
D1
2.459 2.850 3.242 4.134 4.937 5.937 6.647 8.376 10.106 11.835 13.835 15.294 17.294 19.294
H2
0.307 0.368 0.429 0.491 0.613 0.613 0.767 0.920 1.074 1.227 1.227 1.534 1.534 1.534
H1
0.271 0.325 0.379 0.433 0.541 0.541 0.677 0.812 0.947 1.083 1.083 1.353 1.353 1.353
min 2.675 3.110 3.545 4.480 5.350 6.350 7.188 9.026 10.863 12.701 14.701 16.376 18.376 20.376
max 2.775 3.222 3.663 4.605 5.500 6.500 7.348 9.206 11.063 12.913 14.913 16.600 18.600 20.600
min 2.699 3.137 3.574 4.510 5.385 6.385 7.226 9.068 10.911 12.752 14.752 16.430 18.430 20.430
max 2.714 3.155 3.593 5.530 5.408 6.408 7.251 9.096 10.943 12.786 14.786 16.466 18.466 20.466
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MF米制细牙螺纹基本牙型与尺寸和公差带
代号（大径）
螺 距
螺纹中径
外螺纹小径
内螺纹小径
外 螺 纹 全 齿 高
螺纹中径尺寸
配合齿高
（6H公差带级别）
丝锥螺纹中径 (H2公差带级别为例)
d = D M3 M3.5 M4 M5 M6 M8 M10 M10 M12 M12 M14 M16 M18 M18 M20 M20 M22 M22
P
0.35 0.35 0.5 0.5 0.75 1.0 1.0 1.25 1.25 1.5 1.5 1.5 1.5 2.0 1.5 2.0 1.5 2.0
d2 =D2 2.773 2.273 3.675 4.675 5.513 7.350 9.350 9.188 11.188 11.026 13.026 15.026 17.026 16.701 19.026 18.701 21.026 20.701
d1 2.571 3.071 3.387 4.387 5.080 6.773 8.773 8.466 10.466 10.160 12.160 14.160 16.160 15.546 18.160 17.546 20.160 19.546
D1
2.621 3.121 3.459 4.459 5.188 6.917 8.917 8.647 10.647 10.376 12.376 14.376 16.376 15.835 18.376 17.835 20.376 19.835
H2
0.215 0.215 0.307 0.307 0.460 0.613 0.613 0.767 0.767 0.920 0.920 0.920 0.920 1.227 0.920 1.227 0.920 1.227
H1
0.189 0.189 0.271 0.271 0.406 0.541 0.541 0.677 0.677 0.812 0.812 0.812 0.812 1.083 0.812 1.083 0.812 1.083
min 2.773 3.273 3.675 4.675 5.513 7.350 9.350 9.188 11.188 11.026 13.026 15.026 17.026 16.701 19.026 18.701 21.026 20.701
max 2.863 3.363 3.775 4.775 5.645 7.500 9.500 9.348 11.368 11.216 13.216 15.216 17.216 16.913 19.216 18.913 21.216 20.913
min 2.794 3.294 3.699 4.699 5.545 7.385 9.385 9.226 11.226 11.068 13.068 15.068 17.068 16.752 19.068 18.752 21.068 20.752
max 2.809 3.309 3.714 4.714 5.566 7.408 9.408 9.251 11.251 11.096 13.096 15.096 17.096 16.786 19.096 18.786 21.096 20.786
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UNC统一粗牙螺纹基本牙型与尺寸和公差带
代 号 （螺纹直径—
螺 距
螺纹大径
螺纹中径
内螺纹小径
外螺纹小径
螺纹中径尺寸
丝锥螺纹中径
25.4m内牙数）
P
0.635 0.794 0.794 1.058 1.058 1.270 1.411 1.588 1.814 1.954 2.117 2.309 2.540 2.822 3.175
d =D 3.175 3.505 4.166 4.826 5.486 6.350 7.938 9.525 11.112 12.700 14.288 15.875 19.050 22.225 25.400
d2=D2 2.746
D1
2.487 2.647 3.307 3.680 4.341 4.976 6.411 7.805 9.149 10.584 11.996 13.376 16.229 19.169 21.963
d1 2.395 2.532 3.193 3.528 4.188 4.793 6.205 7.577 8.887 10.302 11.692 13.043 15.933 18.763 21.504
2B 3B 2B
min 2.764 2.990 3.650 4.138 4.798 5.524 7.021 8.494 9.934
max 2.847 3.084 3.746 4.247 4.910 5.646 7.155 8.639
3B max 2.827 3.058 3.721 4.219 4.882 5.616 7.120 8.603
min 2.776 3.105 3.675 4.963 4.823 5.575 7.071 8.545 9.985
max 2.789 3.028 3.688 4.176 4.836 5.588 7.084 8.557 9.997
NO.5—40 NO.6—32 NO.8—32 NO.10—24 NO.12—24 UNC1/4"-20 UNC5/16"-18 UNC3/8"-16 UNC7/16"-14 UNC1/2"-13 UNC9/16"-12 UNC5/8"-11 UNC3/4"-10 UNC7/8"-9 UNC1"-8
2.990
3.650 4.138 4.798 5.524 7.021 8.494 9.934 11.430 12.913 14.376 17.399 20.390 23.338
10.089 10.051
11.430 11.595 11.552 11.481 11.494 12.913 13.086 13.043 12.964 12.977 14.376 14.559 14.514 14.427 14.440 17.399 17.595 17.544 17.450 17.463 20.391 20.599 20.546 20.455 20.467 23.338 23.561 23.505 23.401 23.414
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2022-05-23
