براغي رأس مقبس M3-0.5 X 18mm | رأس مسطح محرك مقبس سداسي | سن كامل | فولاذ سبائكي فئة 12.9 مطلي بالزنك (600/عبوة)

I needed a bulk pack for a jig I've been building, and the 12.9 alloy steel feels noticeably tougher than the usual 18-8 stuff. The zinc plating is even and should hold up well.

The hex socket drive is cleanly machined, so the Allen key grabs firmly without any slip. For the price per piece, having 600 fully threaded 12.9 alloy steel screws in one box is a solid deal for any tooling bench stock.

Installing these into a jig I'm building, I noticed how consistently tight the threading is across the whole batch—really cut down on assembly time. The zinc plating on each screw looks even and clean, which should help with rust in the long run.