M6-1 X 80mm 內六角螺絲 | 平頭六角孔驅動 | 部分螺紋 | 10.9級合金鋼熱處理黑氧化物 (200個/包)

I needed some longer M6 bolts for a jig I was building, and these 80mm socket caps fit perfectly. The partially threaded design gave me just the right grip depth in my fixture plate.

The black oxide finish on these 10.9 alloy steel screws looks properly done, no flaking even after tightening them into my jig with an Allen key. The partial threading gives just enough grip for an 80mm reach without fighting the full length. I've already used half the pack on a couple of tooling se

These M6 flatheads hold perfectly in my jig setup; the black oxide finish hasn't chipped at all during repeated tightening. Exactly the precision I needed for aligning fixtures.