M12-1.75 X 22mm 內六角螺絲 | 六角驅動 | 全牙 | 12.9級合金鋼熱處理黑氧化物 (100顆/包)

The black oxide finish on these screws made them slide right into the jig without any binding, which was a pleasant surprise. I torqued them down firmly and the hex socket held perfectly without stripping.

I needed a set of high-strength fasteners for a jig I’m building, and these M12-1.75 x 22mm socket cap screws fit the bill perfectly. The Class 12.9 alloy steel feels incredibly sturdy, and the hex socket drive made installation with an Allen key smooth and secure.

The black oxide finish on these screws held up perfectly during a recent tooling setup, no chipping or wear at all. Each one threaded smoothly into the jig without binding, and the hex socket drive gave me good torque control. Exactly what I needed for precision assembly work.