hexagon socket headless screw with cup point

... 内六角无头凹端螺钉||hexagon socket headless screw with cup point|| 内六角圆柱头螺钉||hexagon socket head cap screw|| ...

内六角螺钉,inner... ... ) hexagon socket headless screw with cup point 带圆柱端的无头内六角螺钉 ) inner hexagon 内六方 ...