UNJC unified coarse thread ASME B1.15 and ISO 3161 ;航空用统一粗牙螺纹 | ||||
ø | 牙距=P | Nut Thread Minor-ø 内螺纹小径 | 预钻孔径mm | |
d1 | TPI | mini 最小 | maxi 最大 | |
UNJC No.4 | 40 | 2.226 | 2.391 | 2.30 |
UNJC No.6 | 32 | 2.732 | 2.938 | 2.80 |
UNJC No.8 | 32 | 3.393 | 3.599 | 3.50 |
UNJC No.10 | 24 | 3.795 | 4.064 | 3.90 |
UNJC 1/4" | 20 | 5.113 | 5.387 | 5.20 |
UNJC 5/16" | 18 | 6.563 | 6.833 | 6.70 |
UNJC 3/8" | 16 | 7.978 | 8.255 | 8.10 |
UNJC 1/2" | 13 | 10.796 | 11.093 | 10.90 |
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