Sheet3
常用螺纹拧入深度表
常用螺纹底孔深度表
公制螺纹底孔牙深明细表(单位mm)
公制粗牙
牙距
底孔径
钻孔深度
螺纹深度
公制细牙
M1.0
M1.1
M1.2
M1.4
M1.6
M1.7
M1.8
M2.0
M2.5
M2.2
M3.0
M2.3
M3.5
M4.0
M2.6
M4.5
M5.0
M5.5
M6.0
M7.0
M8.0
M9.0
M10.0
M11.0
M12.0
M14.0
M16.0
M18.0
M15.0
M20.0
M22.0
M24.0
M27.0
M17.0
M30.0
M33.0
M36.0
M39.0
M18
M42.0
M45.O
说明:螺纹有效深度要大于螺孔直径的1.5倍,如M4有效牙要大于6mm
只要有效螺纹有7个螺距就够了。或者螺栓拧入深度是螺栓直径的1.5d（对于钢），2d（对于铝合金）
常用螺纹拧入深度
公称直径（d）
铸铁
通孔
盲孔
拧入深度h
拧入深度H
攻螺纹深度H1
钻孔深度H2
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