M12-1.75 X 12mm براغي ذات رأس أسطواني | محرك سداسي | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 مطلي بالزنك (50/عبوة)

Picked up a pack of these for a jig I’m building, and the hex socket drive fits my Allen keys perfectly without any stripping. The zinc plating feels solid and corrosion-resistant out of the box, which I appreciate for long-term use.

Used these for a few precision tooling fixtures I’ve been assembling, and the 12.9 grade alloy steel feels noticeably tougher than standard bolts. The zinc plating held up well during setup without any galling, and the hex socket seated nicely in my driver. Exactly what I needed for a high-stress cl

Installed these in a jig I built for a repeat drilling operation and the hex socket drive made them easy to torque to spec without stripping. The 12.9 alloy steel feels noticeably harder than the standard 12.9 stuff I've used before.