براغي رأس مقبس M8-1.25 × 50 مم | محرك مقبس سداسي | ملولبة جزئياً | فولاذ سبائك فئة 8.8 أكسيد أسود حراري (200 / عبوة)

I needed a bulk set of socket cap screws for my shop jigs, and the thermal black oxide finish on these resists rust better than bare steel. They drive smoothly with a hex key and hold tight under load.

The partially threaded shank on these M8 bolts made aligning them into my milling fixture much easier than fully threaded ones I’ve used before. The black oxide finish looks consistent across all 200 pieces, and they tightened smoothly with a hex key.

Put together a new set of fixtures for the shop, and these had exactly the right thread engagement for the thicker plates. The black oxide finish seems evenly applied and should hold up well in a dry environment.