M22-2.5 x 240mm 內六角螺絲 | 六角驅動 | 部分螺紋 | 12.9 級合金鋼 熱處理黑色氧化 (5 顆/包)

The black oxide finish on these M22s is exactly what I wanted for a jig assembly—no glare under shop lights, and the hex socket drive seated cleanly without any wobble. At 240mm and partially threaded, they gave me just the right grip depth for a heavy clamp setup. Class 12.9 rating gives me confide

These bolts handled the torque on my press jig without any flex. The hex socket drive made installation straightforward with my Allen key set.

These M22-2.5 x 240mm hex socket screws threaded up cleanly into my jig fixture, and the black oxide finish looks professional. The partial threading gave me just the right grip for a tight assembly without needing a full-length thread. For precision tooling, the 12.9 alloy steel feels sturdy and du