براغي مقبس M6-1 × 125 مم | محرك سداسي | خيط جزئي | سبيكة فولاذ درجة 12.9 مع أكسيد أسود حراري (100/عبوة)

The black oxide finish on these is unusually even, no bare spots or rough threads out of the box. I've torqued them into a tooling plate and they bottom out clean every time, the 12.9 alloy steel feels seriously rigid. For a hundred pieces at this price, the consistent thread pitch alone makes them

Used these for a jig I was building and the 12.9 grade held up perfectly under heavy clamping torque. The partial threading made alignment easier than fully threaded bolts.

The black oxide finish on these screws is a nice touch—no glare under bright shop lights, and they slide into jigs easily. Threads are clean right out of the box, and the hex drive grips tight without stripping. Perfect for my precision assembly work.