براغي ذات رأس مقبس M6-1 × 50 مم | محرك مقبس سداسي | جزئي الخيط | فئة 12.9 سبيكة فولاذية مؤكسدة حرارياً سوداء (400 / عبوة)

The black oxide coating on these screws is a nice touch—they resist the oily fingerprints from my shop floor better than stainless. They seated perfectly into my jig’s threaded holes with zero wobble. For fifty bucks per 400 pack, this is a solid deal for any machinery build.

Exactly what I needed for building a sturdy jig; the 12.9 alloy steel feels much tougher than the standard ones I’ve used before. The hex socket drive grips perfectly, and the black oxide coating adds a nice, professional touch without any glare.

I needed some strong fasteners for a jig I was building, and these 12.9 alloy steel screws handled the torque without stripping the hex socket. The partially threaded design made alignment easier than I expected.