براغي رأس أسطوانية M10-1.5 × 80 مم | محرك سداسي | خيط جزئي | سبائك فولاذية فئة 12.9 بأكسيد أسود حراري (100 / عبوة)

These screws fit perfectly into a custom fixture I’m building. The black oxide finish seems durable and the hex socket drive made installation easy with just a standard Allen key.

I needed 80mm length for a jig I was building, and these threaded in smoothly without any binding. The hex socket drive gripped perfectly with my Allen key, and the black oxide looks durable.

The black oxide finish is honestly the best part—these screws don’t show a hint of wear after a week of constant tightening in my fixture. That 12.9 alloy steel makes them feel unbreakable, and the partially threaded design seated perfectly in my 80mm clearance.