Screw SPEC ?d ?D M 1
? 0.8? 2~2.2M 1.4
? 1.1? 2.8~3.2M 1.7
? 1.4? 3.2~3.5M 2.0
? 1.7 mm ? 4.3~4.4 mm M 2.3
? 1.9 mm ? 4.7~4.8mm M 2.6
? 2.3 mm ? 5.0 mm M 3.0
? 2.6 mm ? 5.5 mm M3.5? 3.0 mm ? 6.0 mm
钻普通螺纹底孔的钻头直径
塑胶钢、紫铜铸铁、青、黄铜0.35 2.65 2.650.5 2.5 2.50.5 3.5 3.50.7 3.3 3.30.5 4.5 4.50.8 4.2 4.10.75
5.2 5.21
5 4.90.75
7.27.11
7 6.91.25
6.7 6.60.75
9.29.11
98.91.25
8.78.61.5
8.58.41
1110.91.26
10.710.61.5
10.510.41.710.210.1罗纹直径d
螺距P 钻头直径D 3
1012
84
5
6
板金件常用自攻螺钉底孔、翻边孔直径及翻边高度