英制螺纹对照表
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External Thread /Internal Thread a For Class 2A threads with coating (plating) the max. is increased by the allowance, to the basic size. This is the same value as Class 3A. b For uncoated hot-rolled, but not standard fasteners with cold rolled threads c UN series external thread, Max.Diameter =Basic - Allowance, for Class 1A and 2A =Basic for Class 3A
Maxa Major
Cla Allowa Max Minor ss nce
Min Major Min Minor
Min
-
b
2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 2A 2B 2A 2B 2A 2B
Nominal Size, TPI, Series 0-80 UNF 0-80 UNF 1-64 UNC 1-64 UNC 1-72 UNF 1-72 UNF 2-56 UNC 2-56 UNC 2-64 UNF 2-64 UNF 3-48 UNC 3-48 UNC 3-56 UNF 3-56 UNF 4-40 UNC 4-40 UNC 4-48 UNF 4-48 UNF 5-40 UNC
UNRc Minor Dia
陈拓延2004共33页第2页
ቤተ መጻሕፍቲ ባይዱ
Ext. Int. Ext. 12-28 UNF Int. Ext. 12-28 UNF Int. Ext. 12-32 UNEF Int. Ext. 12-32 UNEF Int. Ext. 12-36 UNS Int. Ext. 12-40 UNS Int. Ext. 12-48 UNS Int. Ext. 12-56 UNS Int. Ext. 1/4-20 UNC Int. Ext. 1/4-20 UNC Int. Ext. 1/4-20 UNC Int. Ext. 1/4-24 UNS Int. Ext. 1/4-27 UNS Int. Ext. 1/4-28 UNF Int. Ext. 1/4-28 UNF Int. Ext. 1/4-28 UNF Int. Ext. 1/4-32 UNEF Int. Ext. 1/4-32 UNEF Int. Ext. 1/4-36 UNS Int. Ext. Int.
Maxa Major Min Pitch Dia(Min) Pitch 2.847 2.764 3.175 2.764 2.715 2.418 2.827 2.764 3.175 2.781 2.718 2.469 2.880 2.799 3.175 2.799 2.751 2.487 2.860 2.799 3.175 2.969 2.898 2.540 3.084 2.990 3.505 2.990 2.936 2.560 3.058 2.990 3.505 3.073 3.007 2.728 3.180 3.094 3.505 3.094 3.043 2.748 3.157 3.094 3.505 3.627 3.553 3.198 3.747 3.650 4.166 3.650 3.594 3.221 3.721 3.650 4.166 3.688 3.617 3.305 3.800 3.708 4.166 4.166 3.655 3.325 3.777 3.708 4.166 4.112 4.028 3.541 4.247 4.138 4.826 4.138 4.074 3.566 4.219 4.138 4.826 4.211 4.128 3.719 4.346 4.237 4.826 4.288 4.211 3.858 4.409 4.310 4.826 4.310 4.252 3.881 4.384 4.310 4.826 4.346 4.270 3.962 4.468 4.369 4.826 4.392 4.318 4.044 4.509 4.415 4.826 4.463 4.397 4.176 4.569 4.483 4.826 4.514 4.450 4.270 4.613 4.531 4.826 4.773 4.686 4.201 4.910 4.798 5.486
Maxa Major
Cla Allowa Max Minor ss nce
Min Major Min Minor
Min
-
b
2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A
1
Nominal Size, TPI, Series 12-24 UNC
Maxa Major
Cla Allowa Max Minor ss nce
Min Major Min Minor
/4-40 UNS
3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 2A 2B 2A 2B 1A 1B 2A 2B 3A 3B 2A 2B 2A 2B 1A 1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B
0 0 0 0.01778 0 0 0 0.02032 0 0 0 0.02032 0 0 0 0.02286 0 0 0 0.02032 0 0 0 0.0254 0 0 0 0.0254 0 0.02286 0 0 0 0.02286 0 0.02286 0 0.02032 0 0.01778 0 0.0254 0
0 5.486 0 4.590 0.0254 5.461 0 4.724 0 5.486 0 4.717 0.02286 5.464 0 4.826 0 5.486 0 4.813 0.02286 5.464 0 4.877 0.02286 5.464 0 4.953 0.02032 5.466 0 5.029 0.01778 5.469 0 5.105 0.02794 6.322 0 5.258 0.02794 6.322 0 5.258 0 6.350 0 5.250 0.02794 6.322 0 5.461 0.0254 6.325 0 5.563 0.0254 6.325 0 5.588 0.0254 6.325 0 5.588 0 6.350 0 5.563 0.0254 6.325 0 5.690 0 6.350 0 5.662 0.02286 31.727 0 5.740 0.02286 6.327 0 5.817
1.430 1.181 1.443 1.181 1.742 1.425 1.758 1.425 1.750 1.473 1.765 1.473 2.065 1.694 2.080 1.694 2.073 1.755 2.088 1.755 2.383 1.941 2.400 1.941 2.393 2.024 2.410 2.024 2.695 2.156 2.715 2.156 2.713 2.271 2.731 2.271 3.025
2.697 3.175 2.697 3.157 2.741 3.175 2.741 3.485 2.896 3.505 2.896 3.485 3.023 3.505 3.012 4.143 3.531 4.166 3.528 4.145 3.607 4.166 3.597 4.801 3.962 4.826 3.950 4.801 4.064 4.803 4.166 4.826 4.168 4.803 4.216 4.803 4.293 4.806 4.369 4.808 4.445 5.461 4.597
Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext.
Maxa Major Min Pitch Dia(Min) Pitch 1.306 1.260 1.133 1.377 1.318 1.524 1.318 1.285 1.146 1.361 1.318 1.524 1.582 1.532 1.367 1.664 1.598 1.854 1.598 1.560 1.382 1.646 1.598 1.854 1.610 1.562 1.420 1.689 1.626 1.854 1.626 1.590 1.435 1.674 1.626 1.854 1.875 1.821 1.631 1.961 1.890 2.184 1.890 1.849 1.646 1.943 1.890 2.184 1.913 1.862 1.697 1.996 1.928 2.184 1.928 1.890 1.712 1.979 1.928 2.184 2.154 2.096 1.864 2.248 2.172 2.515 2.172 2.129 1.882 2.228 2.172 2.515 2.202 2.146 1.958 2.291 2.220 2.515 2.220 2.179 1.976 2.273 2.220 2.515 2.413 2.350 2.068 2.517 2.433 2.845 2.433 2.385 2.088 2.494 2.433 2.845 2.484 2.423 2.195 2.581 2.502 2.845 2.502 2.456 2.212 2.560 2.502 2.845 2.743 2.677 2.398
0.0127 0 0 0 0.01524 0 0 0 0.01524 0 0 0 0.01524 0 0 0 0.01524 0 0 0 0.01778 0 0 0 0.01778 0 0 0 0.02032 0 0 0 0.01778 0 0 0 0.02032
1.511 1.306 1.524 1.306 1.839 1.582 1.854 1.582 1.839 1.613 1.854 1.613 2.169 1.872 2.184 1.872 2.169 1.913 2.184 1.913 2.497 2.146 2.515 2.146 2.497 2.197 2.515 2.197 2.824 2.385 2.845 2.385 2.827 2.459 2.845 2.459 3.155
2.487 3.045 2.487 3.035 2.550 3.053 2.550 3.332 2.642 3.353 2.642 3.355 2.819 3.376 2.819 3.990 3.302 4.013 3.302 4.006 3.404 4.026 3.404 4.618 3.683 4.643 3.683 4.636 3.835 4.651 3.962 4.674 3.962 4.663 4.064 4.674 4.140 4.691 4.242 4.704 4.343 5.278 4.343
UNRc Minor Dia
陈拓延2004共33页第1页
Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. 5-40 UNC 5-44 UNF 5-44 UNF 6-32 UNC 6-32 UNC 6-40 UNF 6-40 UNF 8-32 UNC 8-32 UNC 8-36 UNF 8-36 UNF 10-24 UNC 10-24 UNC 10-28 UNS 10-32UNF 10-32UNF 10-36 UNS 10-40 UNS 10-48 UNS 10-56 UNS 12-24 UNC
Maxa Major
Cla Allowa Max Minor ss nce
Min Major Min Minor
Min
-
b
2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 2A 2B 2A 2B 2A 2B
Nominal Size, TPI, Series 0-80 UNF 0-80 UNF 1-64 UNC 1-64 UNC 1-72 UNF 1-72 UNF 2-56 UNC 2-56 UNC 2-64 UNF 2-64 UNF 3-48 UNC 3-48 UNC 3-56 UNF 3-56 UNF 4-40 UNC 4-40 UNC 4-48 UNF 4-48 UNF 5-40 UNC
UNRc Minor Dia
陈拓延2004共33页第2页
ቤተ መጻሕፍቲ ባይዱ
Ext. Int. Ext. 12-28 UNF Int. Ext. 12-28 UNF Int. Ext. 12-32 UNEF Int. Ext. 12-32 UNEF Int. Ext. 12-36 UNS Int. Ext. 12-40 UNS Int. Ext. 12-48 UNS Int. Ext. 12-56 UNS Int. Ext. 1/4-20 UNC Int. Ext. 1/4-20 UNC Int. Ext. 1/4-20 UNC Int. Ext. 1/4-24 UNS Int. Ext. 1/4-27 UNS Int. Ext. 1/4-28 UNF Int. Ext. 1/4-28 UNF Int. Ext. 1/4-28 UNF Int. Ext. 1/4-32 UNEF Int. Ext. 1/4-32 UNEF Int. Ext. 1/4-36 UNS Int. Ext. Int.
Maxa Major Min Pitch Dia(Min) Pitch 2.847 2.764 3.175 2.764 2.715 2.418 2.827 2.764 3.175 2.781 2.718 2.469 2.880 2.799 3.175 2.799 2.751 2.487 2.860 2.799 3.175 2.969 2.898 2.540 3.084 2.990 3.505 2.990 2.936 2.560 3.058 2.990 3.505 3.073 3.007 2.728 3.180 3.094 3.505 3.094 3.043 2.748 3.157 3.094 3.505 3.627 3.553 3.198 3.747 3.650 4.166 3.650 3.594 3.221 3.721 3.650 4.166 3.688 3.617 3.305 3.800 3.708 4.166 4.166 3.655 3.325 3.777 3.708 4.166 4.112 4.028 3.541 4.247 4.138 4.826 4.138 4.074 3.566 4.219 4.138 4.826 4.211 4.128 3.719 4.346 4.237 4.826 4.288 4.211 3.858 4.409 4.310 4.826 4.310 4.252 3.881 4.384 4.310 4.826 4.346 4.270 3.962 4.468 4.369 4.826 4.392 4.318 4.044 4.509 4.415 4.826 4.463 4.397 4.176 4.569 4.483 4.826 4.514 4.450 4.270 4.613 4.531 4.826 4.773 4.686 4.201 4.910 4.798 5.486
Maxa Major
Cla Allowa Max Minor ss nce
Min Major Min Minor
Min
-
b
2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A
1
Nominal Size, TPI, Series 12-24 UNC
Maxa Major
Cla Allowa Max Minor ss nce
Min Major Min Minor
/4-40 UNS
3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 2A 2B 2A 2B 1A 1B 2A 2B 3A 3B 2A 2B 2A 2B 1A 1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B
0 0 0 0.01778 0 0 0 0.02032 0 0 0 0.02032 0 0 0 0.02286 0 0 0 0.02032 0 0 0 0.0254 0 0 0 0.0254 0 0.02286 0 0 0 0.02286 0 0.02286 0 0.02032 0 0.01778 0 0.0254 0
0 5.486 0 4.590 0.0254 5.461 0 4.724 0 5.486 0 4.717 0.02286 5.464 0 4.826 0 5.486 0 4.813 0.02286 5.464 0 4.877 0.02286 5.464 0 4.953 0.02032 5.466 0 5.029 0.01778 5.469 0 5.105 0.02794 6.322 0 5.258 0.02794 6.322 0 5.258 0 6.350 0 5.250 0.02794 6.322 0 5.461 0.0254 6.325 0 5.563 0.0254 6.325 0 5.588 0.0254 6.325 0 5.588 0 6.350 0 5.563 0.0254 6.325 0 5.690 0 6.350 0 5.662 0.02286 31.727 0 5.740 0.02286 6.327 0 5.817
1.430 1.181 1.443 1.181 1.742 1.425 1.758 1.425 1.750 1.473 1.765 1.473 2.065 1.694 2.080 1.694 2.073 1.755 2.088 1.755 2.383 1.941 2.400 1.941 2.393 2.024 2.410 2.024 2.695 2.156 2.715 2.156 2.713 2.271 2.731 2.271 3.025
2.697 3.175 2.697 3.157 2.741 3.175 2.741 3.485 2.896 3.505 2.896 3.485 3.023 3.505 3.012 4.143 3.531 4.166 3.528 4.145 3.607 4.166 3.597 4.801 3.962 4.826 3.950 4.801 4.064 4.803 4.166 4.826 4.168 4.803 4.216 4.803 4.293 4.806 4.369 4.808 4.445 5.461 4.597
Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext.
Maxa Major Min Pitch Dia(Min) Pitch 1.306 1.260 1.133 1.377 1.318 1.524 1.318 1.285 1.146 1.361 1.318 1.524 1.582 1.532 1.367 1.664 1.598 1.854 1.598 1.560 1.382 1.646 1.598 1.854 1.610 1.562 1.420 1.689 1.626 1.854 1.626 1.590 1.435 1.674 1.626 1.854 1.875 1.821 1.631 1.961 1.890 2.184 1.890 1.849 1.646 1.943 1.890 2.184 1.913 1.862 1.697 1.996 1.928 2.184 1.928 1.890 1.712 1.979 1.928 2.184 2.154 2.096 1.864 2.248 2.172 2.515 2.172 2.129 1.882 2.228 2.172 2.515 2.202 2.146 1.958 2.291 2.220 2.515 2.220 2.179 1.976 2.273 2.220 2.515 2.413 2.350 2.068 2.517 2.433 2.845 2.433 2.385 2.088 2.494 2.433 2.845 2.484 2.423 2.195 2.581 2.502 2.845 2.502 2.456 2.212 2.560 2.502 2.845 2.743 2.677 2.398
0.0127 0 0 0 0.01524 0 0 0 0.01524 0 0 0 0.01524 0 0 0 0.01524 0 0 0 0.01778 0 0 0 0.01778 0 0 0 0.02032 0 0 0 0.01778 0 0 0 0.02032
1.511 1.306 1.524 1.306 1.839 1.582 1.854 1.582 1.839 1.613 1.854 1.613 2.169 1.872 2.184 1.872 2.169 1.913 2.184 1.913 2.497 2.146 2.515 2.146 2.497 2.197 2.515 2.197 2.824 2.385 2.845 2.385 2.827 2.459 2.845 2.459 3.155
2.487 3.045 2.487 3.035 2.550 3.053 2.550 3.332 2.642 3.353 2.642 3.355 2.819 3.376 2.819 3.990 3.302 4.013 3.302 4.006 3.404 4.026 3.404 4.618 3.683 4.643 3.683 4.636 3.835 4.651 3.962 4.674 3.962 4.663 4.064 4.674 4.140 4.691 4.242 4.704 4.343 5.278 4.343
UNRc Minor Dia
陈拓延2004共33页第1页
Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. 5-40 UNC 5-44 UNF 5-44 UNF 6-32 UNC 6-32 UNC 6-40 UNF 6-40 UNF 8-32 UNC 8-32 UNC 8-36 UNF 8-36 UNF 10-24 UNC 10-24 UNC 10-28 UNS 10-32UNF 10-32UNF 10-36 UNS 10-40 UNS 10-48 UNS 10-56 UNS 12-24 UNC