براغي رأس أسطوانية M16-2 × 85 مم | محرك مقبس سداسي | خيط جزئي | فولاذ سبائكي فئة 12.9 مطلي بالزنك (25 / عبوة)

The partially threaded design let me seat these deep into my fixture plate without binding, and the zinc plating slid into the tapped holes way smoother than the dry black oxide bolts I've used before. Class 12.9 strength gives real peace of mind for the tooling jigs I'm building, and the hex socket

Needed a high-strength bolt for a press fixture and these Class 12.9 alloy steel caps held up perfectly under repeated load. The zinc plating looks clean and seems corrosion-resistant.

Installed these in a jig frame for a 5-ton press and the class 12.9 alloy steel held up perfectly under repeat loads. The zinc coating adds a nice bit of corrosion protection too.