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英制普通螺纹 (惠氏螺纹) -- 粗牙 (BSW) 名义尺寸
Ww 牙型代号 大径
mm
d=D 螺距
mm
p 每英寸牙数
tpi 中径
mm
d2=D2 小径
外螺纹
d3 牙型高
H1 底孔直径
mm
1/16＂ BSW 1.587 0.423 60 1.315 1.050 0.270 1.15
3/32＂ BSW 2.381 0.529 48 2.041 1.703 0.338 1.90
1/8＂ BSW 3.175 0.635 40 2.768 2.362 0.406 2.50
5/32＂ BSW 3.969 0.793 32 3.459 2.952 0.507 3.20
3/16＂ BSW 4.762 1.058 24 4.084 3.407 0.677 3.70
7/32＂ BSW 5.556 1.058 24 4.878 4.201 0.677 4.50
1/4＂ BSW 6.350 1.270 20 5.537 4.724 0.813 5.10
5/16＂ BSW 7.938 1.411 18 7.034 6.131 0.904 6.50
3/8＂ BSW 9.525 1.588 16 8.509 7.492 1.017 7.90
7/16＂ BSW 11.113 1.814 14 9.951 8.789 1.162 9.20
1/2＂ BSW 12.700 2.117 12 11.345 9.990 1.355 10.40
5/8＂ BSW 15.876 2.309 11 14.397 12.918 1.479 13.40
3/4＂ BSW 19.051 2.540 10 17.424 15.798 1.627 16.25
7/8＂ BSW 22.226 2.822 9 20.419 18.611 1.807 19.25
1＂ BSW 25.400 3.175 8 23.368 21.335 2.033 22.00
1 1/8＂ BSW 28.576 3.629 7 26.253 23.929 2.324 24.50
1 1/4＂ BSW 31.751 3.629 7 29.428 27.104 2.324 27.25
1 3/8＂ BSW 34.926 4.233 6 32.215 29.505 2.711 30.25
1 1/2＂ BSW 38.100 4.233 6 35.391 32.680 2.711 33.50
1 5/8＂ BSW 41.277 5.080 5 38.024 34.771 3.253 35.50
1 3/4＂ BSW 44.452 5.080 5 41.199 37.946 3.253 38.50
1 7/8＂ BSW 47.627 5.645 4 1/2 44.012 40.398 3.614 41.25
2＂ BSW 50.802 5.645 4 1/2 47.187 43.573 3.614 44.50
2 1/4＂ BSW 57.152 6.350 4 53.086 49.020 4.066 50.00
2 1/2＂ BSW 63.502 6.350 4 59.436 55.370 4.066 56.00
2 3/4＂ BSW 69.853 7.257 3 1/2 65.205 60.558 4.647 61.50
3＂ BSW 76.203 7.257 3 1/2 71.556 66.909 4.647 68.00
3 1/4＂ BSW 82.553 7.816 3 1/4 77.548 72.544 5.005 73.75
3 1/2＂ BSW 88.903 7.816 3 1/4 83.899 78.894 5.005 80.00
3 3/4＂ BSW 95.254 8.467 3 89.832 84.410 5.422 85.50
4＂ BSW 101.604 8.467 3 96.182 90.760 5.422 92.00
4 1/4＂ BSW 107.954 8.835 2 7/8 102.297 96.639 5.657 98.00
4 1/2＂ BSW 114.304 8.835 2 7/8 108.647 102.990 5.657 104.20
4 3/4＂ BSW 120.665 9.237 2 3/4 114.740 108.625 5.915 110.00
5＂ BSW 127.005 9.237 2 3/4 121.090 115.176 5.915 116.50
5 1/4＂ BSW 133.355 9.677 2 5/8 127.159 120.963 6.196 122.50
5 1/2＂ BSW 139.705 9.677 2 5/8 133.509 127.313 6.196 128.50
5 3/4＂ BSW 146.055 10.160 2 1/2 139.549 133.043 6.506 134.50
6＂ BSW 152.406 10.160 2 1/2 145.900 139.394 6.506 141.00

英制普通螺纹 -- 细牙 -- BSF
英制普通螺纹 (惠氏螺纹) -- 细牙 (BSW) 名义尺寸
BSF 牙型代号 大径
mm
d=D 螺距
mm
p 每英寸牙数
tpi 中径
mm
d2=D2 小径
外螺纹
d3 牙型高
H1 底孔直径
mm
3/16 BSF 4.763 0.794 32 4.255 3.747 0.508 4.00
7/32 BSF 5.556 0.907 28 4.975 4.394 0.581 4.60
1/4 BSF 6.350 0.977 26 5.725 5.100 0.625 5.30
9/32 BSF 7.142 0.977 26 6.518 5.893 0.625 6.10
5/16 BSF 7.938 1.156 22 7.199 6.459 0.739 6.80
3/8 BSF 9.525 1.27 20 8.712 7.899 0.813 8.30
7/16 BSF 11.113 1.411 18 10.209 9.304 0.904 9.70
1/2 BSF 12.700 1.588 16 11.684 10.668 1.017 11.10
9/16 BSF 14.288 1.588 16 13.272 12.256 1.017 12.70
5/8 BSF 15.875 1.814 14 14.712 13.549 1.162 14.00
11/16 BSF 17.463 1.814 14 16.300 15.137 1.162 15.50
3/4 BSF 19.050 2.117 12 17.693 16.336 1.355 16.75
13/16 BSF 20.638 2.117 12 19.281 17.924 1.355 18.25
7/8 BSF 22.225 2.309 11 20.747 19.269 1.479 19.75
1 BSF 25.400 2.54 10 23.774 22.148 1.627 22.75
1 1/8 BSF 28.575 2.822 9 26.769 24.963 1.807 26.50
1 1/4 BSF 31.750 2.822 9 29.944 28.138 1.807 28.75
1 3/8 BSF 34.925 3.175 8 32.893 30.861 2.033 31.50
1 1/2 BSF 38.100 3.175 8 36.068 34.036 2.033 34.50
1 5/8 BSF 41.275 3.175 8 39.243 37.211 2.033 38.00
1 3/4 BSF 44.450 3.629 7 42.126 39.802 2.324 40.50
2 BSF 50.800 3.629 7 48.476 46.152 2.324 47.00
2 1/4 BSF 57.150 4.234 6 54.440 51.730 2.711 53.00
2 1/2 BSF 63.500 4.234 6 60.790 58.080 2.711 59.00
2 3/4 BSF 69.850 4.234 6 67.140 64.430 2.711 -
3 BSF 76.200 5.08 5 72.946 69.692 3.253 -
3 1/4 BSF 82.550 5.08 5 79.296 76.042 3.253 -
3 1/2 BSF 88.900 5.645 4 1/2 85.285 81.670 3.614 -
3 3/4 BSF 95.250 5.645 4 1/2 91.635 88.020 3.614 -
4 BSF 101.600 5.645 4 1/2 97.985 94.370 3.614 -
4 1/4 BSF 107.950 6.35 4 103.886 99.822 4.066 -
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