M12-1.75 x 30mm 內六角螺絲 | 六角驅動 | 全螺紋 | 12.9級合金鋼鍍鋅 (50 / 包)

Put these on a jig I’m building, and the hex socket drive made tightening them in tight spots so much easier. The zinc plating seems durable too, no rust after a few weeks in the shop.

Fit was perfect on my tooling fixture and the zinc plating looks clean and even across all fifty pieces. The hex socket drive seated my Allen key with zero wobble, and the 12.9 alloy steel feels rigid enough for repeated clamping without any give.

Used these on a jig I'm building and the threads are clean enough to start by hand, which saved me a ton of time with an Allen key on a tight spot. The zinc coating looks uniform and none of the 50 had any burrs or dings. Solid value for precision work.