Model : 英制粗牙螺紋
標稱 | 鉆頭直徑 | JIS 2級內螺紋內徑 JIS class 2 internal thread minor dia | BSW 內螺紋內徑 BSW internal thread minor dia | |||
A列(硬質材) Line A (Hard materials) | B列(軟質材) Line B (Soft materials) | 最小尺寸 | 最大尺寸 | 最小尺寸 | 最大尺寸 | |
※W1/8-40 | 2.55 | 2.45 | - | - | 2.362 | 2.591 |
※W3/16-24 | 3.7 | 3.6 | - | - | 3.406 | 3.774 |
※W1/4-20 | 5.1 | 5.0 | 4.914 | 5.204 | 4.724 | 5.156 |
W5/16-18 | 6.6 | 6.5 | 6.340 | 6.670 | 6.129 | 6.588 |
W3/8-16 | 8.0 | 7.9 | 7.733 | 8.113 | 7.493 | 7.988 |
W7/16-14 | 9.4 | 9.3 | 9.048 | 9.508 | 8.791 | 9.332 |
W1/2-12 | 10.7 | 10.5 | 10.310 | 10.830 | 9.990 | 10.589 |
W9/16-12 | 12.3 | 12.0 | 11.898 | 12.418 | 11.575 | 12.176 |
W5/8-11 | 13.7 | 13.5 | 13.257 | 13.817 | 12.918 | 13.558 |
W3/4-10 | 16.6 | 16.5 | 16.178 | 16.778 | 15.800 | 16.484 |
W7/8-9 | 19.5 | 19.3 | 19.031 | 19.691 | 18.613 | 19.354 |
W1-8 | 22.4 | 22.0 | 21.814 | 22.514 | 21.336 | 22.148 |
W1 1/8-7 | 25.0 | 24.8 | 24.469 | 25.229 | 23.927 | 24.831 |
W1 1/4-7 | 28.3 | 28.0 | 27.644 | 28.404 | 27.102 | 28.006 |
W1 3/8-6 | 30.5 | 30.3 | 30.123 | 30.923 | - | - |
W1 1/2-6 | 33.8 | 33.5 | 33.298 | 34.098 | 32.680 | 33.703 |
W1 5/8-5 | 36.0 | 35.7 | 35.529 | 36.409 | - | - |
W1 3/4-5 | 39.2 | 39.0 | 38.704 | 39.584 | 37.943 | 39.136 |
W1 7/8-4 1/2 | 41.8 | 41.5 | 41.237 | 42.227 | - | - |
W2-4 1/2 | 45.0 | 44.7 | 44.412 | 45.402 | 43.571 | 44.876 |