ANSI/ASME B 18.2.1 – 2012 – Bu lông liền long đen
Screw Thread | 4-Jan | 16-May | 8-Mar | 16-Jul | 2-Jan | 16-Sep | 8-May | 4-Mar | |
PP | 20 | 18 | 16 | 14 | 13 | 12 | 11 | 10 | |
ds | max | 0.25 | 0.3125 | 0.375 | 0.4375 | 0.5 | 0.5625 | 0.625 | 0.75 |
min | 0.245 | 0.3065 | 0.369 | 0.4305 | 0.493 | 0.5545 | 0.617 | 0.741 | |
s | max | 0.375 | 0.5 | 0.5625 | 0.625 | 0.75 | 0.8125 | 0.9375 | 1.125 |
min | 0.367 | 0.489 | 0.551 | 0.612 | 0.736 | 0.798 | 0.922 | 1.1 | |
dc | max | 0.56 | 0.68 | 0.81 | 0.93 | 1.07 | 1.19 | 1.33 | 1.59 |
h | min | 0.04 | 0.05 | 0.06 | 0.07 | 0.08 | 0.09 | 0.1 | 0.11 |
k | max | 0.28 | 0.32 | 0.39 | 0.46 | 0.51 | 0.57 | 0.62 | 0.73 |
b | L≤6 | 0.75 | 0.875 | 1 | 1.125 | 1.25 | 1.375 | 1.5 | 1.75 |
L>6 | 1 | 1.125 | 1.25 | 1.375 | 1.5 | 1.625 | 1.75 | 2 |