براغي ذات رأس أسطواني M16-1.5 X 40mm | محرك سداسي داخلي | خيط كامل | سبائك فولاذية فئة 12.9 مؤكسدة باللون الأسود الحراري (25/عبوة)

Torqued these down on a jig today and the hex socket gripped perfectly without any rounding. The 12.9 grade gives me confidence these won’t snap under heavy load.

The black oxide finish on these screws gives them a nice, uniform look that resists glare in the shop. I used them to secure a metal bracket to a workbench and the hex socket drive made installation effortless. They feel incredibly solid for the price.

I needed a heavy-duty fastener for a jig I was building, and these 12.9 alloy steel screws were tough enough to handle the stress. The black oxide finish also looks clean against the metal and hasn't shown any signs of wear after several days of use.