文档介绍：--------------------校验:_____________--------------------日期:_____________小五金工程评估手册目录螺钉.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................13配合尺寸...............................................13机械性能...............................................13钢板厚度...............................................14特殊螺钉...............................................15自攻螺钉............................................15硬化层深度.........................................15硬度............................................16尺寸............................................16工作扭力.........................................17结合比与预冲孔呎寸关系..................................18钢板孔径及抽牙高...........................................................................................................................................................................................................................................................................................................................................................................................22资料:...............................................23螺钉常见穴型简介........................................23常用板材硬度..........................................23电镀层.............................................23螺母...........