Question

英制螺纹基本尺寸表

Answer 1

惠氏螺纹（英制螺纹）（55°）
BSW(粗牙) BSF(细牙)
大径 英寸 每英寸搏饥牙数 大径 英寸 每英寸牙数

mm 螺距mm mm 螺距mm

1/8" 40
3.175 0.635

3/16" 24 3/16" 32
4.7625 1.0583 4.7625 0.7938

1/4" 20 1/4" 26
6.35 1.27 6.35 0.9769
5/16" 18 5/16" 22
7.9375 1.4111 7.9375 1.1545

3/基亮返8" 16 3/8" 20
9.525 1.5875 9.525 1.27

7/16" 14 7/16" 18
11.1125 1.8143 11.1125 1.41

1/2"键慎 12 1/2" 16
12.7 2.1167 12.7 1.59

9/16" 12 9/16" 16
14.29 2.1167 14.2875 1.5875
5/8" 11 5/8" 14
15.875 2.3091 15.875 1.8143

3/4" 10 3/4" 12
19.05 2.54 19.05 2.1167

7/8" 9 7/8" 11
22.225 2.8222 22.225 2.3091

1" 8 1" 10
25.4 3.175 25.4 2.54

Answer 2