M22-2.5 X 60mm 內六角螺絲 | 六角驅動 | 全牙 | 12.9級合金鋼熱處理黑色氧化 (10/包)

Pulled these out for a precision tooling assembly and the thermal black oxide finish looks sleek and feels like it will resist wear well. The hex socket drove smoothly with zero cam-out, and the 12.9 alloy steel gives them a nice, solid weight. Exactly the strength I needed for this fixture.

Installing these on a heavy jig for work holding and the fully threaded shaft grabbed nicely right from the start. The hex socket drive gave a clean, solid engagement without any rounding under high torque.

The thermal black oxide finish really holds up well in my jig setup, no chipping after several adjustments with a hex key. These 60mm M22 screws feel solid and the threads are clean.