M16-1.5 X 100mm 內六角螺絲 | 六角驅動 | 部分牙 | 12.9級合金鋼熱處理黑氧化 (25顆/包)

I needed a dozen for a heavy jig build, and the black oxide finish on these Class 12.9 screws held up perfectly under torque without any galling. They seated cleanly in the tapped holes with no binding, which saved me a lot of frustration.

The hex socket drive on these M16 bolts made installation in my jig a breeze with just an Allen key. The 100mm length and partial threading gave me exactly the grip I needed for a heavy clamping setup. For 12.9 alloy steel screws at this price, the black oxide finish looks clean and durable too.

I needed a batch of beefy bolts for a custom jig, and these came in with a nice uniform black oxide finish. Threads were clean and seated smoothly with a hex key, though a couple had slightly tight tolerances. Seem solid enough for heavy clamping work.