UNJF unified fine thread ASME B1.15 and ISO 3161 ;航空用统一细牙螺纹 | ||||
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 | |
UNJF No.4 | 48 | 2.329 | 2.467 | 2.40 |
UNJF No.6 | 40 | 2.886 | 3.051 | 2.95 |
UNJF No.8 | 36 | 3.479 | 3.662 | 3.60 |
UNJF No.10 | 32 | 4.053 | 4.253 | 4.15 |
UNJF 1/4" | 28 | 5.466 | 5.662 | 5.60 |
UNJF 5/16" | 24 | 6.907 | 7.110 | 7.00 |
UNJF 3/8" | 24 | 8.494 | 8.680 | 8.60 |
UNJF 1/2" | 20 | 11.463 | 11.660 | 11.50 |
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