螺纹规格 D | M18×1.5 | M20×1.5 | M22×1.5 | |
S | 27 | 33 | 33 | |
d | 39.5 | 48 | 48 | |
m | 27 | 28 | 30 | 33 |
a | 6 | 7.5 | 8 |