GB80内六角凹端紧定螺钉

GB77内六角平端紧定螺钉

GB78内六角凹端紧定螺钉

DIN915/GB79内六角圆柱端紧定螺钉

DIN914/GB78内六角紧定螺钉

DIN916/GB80内六角凹端紧定螺钉

DIN913/GB77内六角平端紧定螺钉

DIN7991/GB70.3内六角沉头螺钉

ISO7380/GB70.2内六角盘头螺钉

DIN7984薄头内六角螺栓

ANSIB18.3美制内六角圆柱头螺栓

DIN912/GB70.1内六角圆柱头螺栓