براغي رأس كبس M8-1 × 30 مم | محرك سداسي | ملولبة بالكامل | فئة 12.9 من سبائك الصلب بأكسيد أسود حراري (200 / عبوة)

The black oxide finish looks sharp on my machine frame, and the hex socket drive seated perfectly with my allen key without any stripping. Threads were clean and consistent across all 200 pieces, which saved me a lot of time sorting through them.

The thermal black oxide finish on these M8 socket cap screws is more durable than I expected, really holding up well in my machining fixture without any surface wear. I used them to replace some stripped bolts on a jig and the hex socket drive made installation smooth and quick.

These bolts fit perfectly for a jig I was assembling, and the 12.9 grade gives me confidence they won't strip under heavy use. The hex socket drive made installation quick with my Allen key.