M6-1 X 20mm 內六角頭螺絲 | 內六角驅動 | 全牙 | 12.9級合金鋼鍍鋅 (400 顆/包)

Used a bunch of these to rebuild a small jig in my workshop, and the hex socket drive made tightening them into tight spaces so much easier. The zinc coating looks clean and should hold up well in my metalworking area.

Had to swap out some worn fasteners on a production fixture, and these M6 screws threaded in smoothly with no binding. The hex socket drive engaged perfectly with my driver, making installation quick. The zinc coating looks consistent across all 400 pieces, which should hold up fine in our shop envi

Installed these on a jig table I was building and they seated perfectly with zero wobble. The zinc coating gives them a clean look, and the 12.9 grade steel makes me confident they'll handle the clamping force.