براغي رأس سداسية M5-0.8 × 40 مم | رأس زرية محرك سداسي | ملولبة بالكامل | درجة 12.9 سبائك فولاذية مؤكسدة سوداء حرارياً (300 / عبوة)

I needed a solid batch of fasteners for building a custom jig, and these M5 screws threaded cleanly into the steel without any binding. The 300-count pack will last me through several projects.

The black oxide finish on these M5 screws gives them a nice, uniform look, and the hex socket drive bites cleanly without stripping. I've used about half the pack on a tooling fixture and every one threaded in smooth and seated tight, exactly what I needed for class 12.9 strength.

Ordered these for a jig I’m building and the threading is perfectly clean all the way down, which made them seat smoothly without any cross-threading. The 12.9 alloy steel feels incredibly rigid for the price, and the black oxide gives them a solid, non-glare look that’s held up during assembly.