供应GB/T840-1988塑料滚花头螺钉
| | 塑料滚花头螺钉(GB/T840-1988) | | | |
螺纹规格d | M4 | M5 | M6 | M8 | M10 | M12 | M16 |
dk | 12 | 16 | 20 | 25 | 28 | 32 | 40 |
k | 5 | 6 | 6 | 8 | 8 | 10 | 12 |
dp | max | 2.5 | 3.5 | 4 | 5.5 | 7 | 8.5 | 12 |
min | 2.25 | 3.2 | 3.7 | 5.2 | 6.64 | 8.14 | 11.57 |
z | max | 2.25 | 2.75 | 3.25 | 4.3 | 5.3 | 6.3 | 8.36 |
min | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 |
R | ~ | 25 | 32 | 40 | 50 | 55 | 65 | 80 |
l | 8`30 | 10`40 | 12`40 | 16`45 | 20`60 | 25`60 | 30`80 |