براغي ذات رأس أسطواني M12-1.25 × 35 مم | محرك سداسي مجوف | ملولبة بالكامل | فولاد سبائكي فئة 12.9 مع أكسيد أسود حراري (100 / عبوة)

These are the exact spec for my jig fixture build—the 12.9 alloy and fine 1.25 thread held up perfectly under repeated clamping. The black oxide coating’s already got a nice, even sheen after a few days in the shop, and every one of the hundred came out of the bag clean with no burrs.

The black oxide finish looks professional and held up fine during assembly on my jig. These M12s are threaded all the way, which made alignment with my fixture plates a lot easier than dealing with partial threads.

Used a handful of these to secure the jig I built for a router table, and the hex socket drive made seating them in tight spots a breeze. The thermal black oxide finish seems like it'll hold up better than the zinc-coated ones I've tried before.