英、美制标准螺纹直径、螺距参照系列表
标准国别美制ANSI BI.1-1982英国标准BS84-1956规格直径UNC牙数/寸UNF牙数/寸BSW牙数/寸BSF牙数/寸0# 1.52/80//
1# 1.856472//
2# 2.185664//
3# 2.514856//
4# 2.844048//
5#,(1/8”) 3.18404440/ 6# 3.513240//
8# 4.173236//
10#(3/16”) 4.8324322432
12#(7/32”) 5.492428/28 1/4” 6.3520282026 5/16”7.9418241822 3/8”9.5316201620 7/16”11.1114201418 1/2”12.7013181216 9/16”14.2912181216 5/8”15.8811/1114
11/16”17.46/161114 3/4”19.0510/1012
13/16”20.64/14//
7/8”22.239/911
15/16”23.81/12//
1”25.40812810
1 1/8”28.5871279
1 1/4”31.7571279
1 3/8”34.93612/8
1 1/2"38.1061268
1 5/8”41.28///8
1 3/4”44.455/57
1 7/8”47.63///
2”50.80 4.5/57
4、普通螺纹螺距表
序号公称直径螺距1M2.50.45 2M30.5 3M40.7 4M50.8 5M61 6M8 1.25 7M10 1.5 8M12 1.75 9M142 10M162 11M18 2.5 12M20 2.5 13M22 2.5 14M243