براغي رأس أسطوانية M18-2.5 × 50mm | محرك سداسي | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 مطلي بالزنك (25 / عبوة)

I needed these for a custom jig I’m building, and the 50mm length was just right for the application. The zinc plating looks clean and seems like it’ll resist rust well during shop use.

Installed these on a new jig for my milling machine and the Class 12.9 alloy steel threads cut cleanly without any galling. The hex socket drive seated firmly and the zinc plating looks like it'll hold up fine in my shop.

Used these to rebuild a fixture on my mill, and the 12.9 alloy steel holds up way better than the 8.8s I was using before. The zinc plating on every screw was consistent with no flaking, which saved me from chasing threads.