M20-2.5 X 70mm 內六角螺絲 | 內六角驅動 | 全牙 | 12.9級合金鋼鍍鋅 (25個/包)

I needed these for a jig I was building, and the 12.9 alloy steel feels much tougher than the usual hardware store screws. The zinc coating looks clean and uniform, too.

The hex socket on these M20 screws drove smoothly without any cam-out, and the fully threaded shaft grabbed perfectly in my jig fixture. For 12.9 alloy steel at this price for 25 pieces, they feel substantial and well-made.

The zinc plating looks even and consistent across all 25 pieces, and the hex socket drive seated perfectly on my torque wrench with zero stripping. These M20s are holding my jig frame together solidly, exactly what I needed for the precision assembly work.