براغي هول-كروم 76808 M24-3 × 40 مم برأس مقبس سداسي | محرك مقبس سداسي | فولاذ سبائكي مؤكسد حراري أسود (25 / عبوة)

Perfect thread fit on my jig fixture right out of the package, and the thermal black oxide looks clean and consistent across all 25 screws. I’ve already used a few in a high-vibration machine setup and they held tight with zero loosening.

I needed a strong, precise fastener for a tooling fixture, and the black oxide coating on these M24 screws gives them a nice, durable finish that resists wear. They threaded cleanly into my assembly with no binding, which saved me time.

Installed these on a jig I'm building and the hex socket drive made tightening them in tight spots effortless. The black oxide finish looks professional and seems durable so far.