براغي رأس أسطوانية M6-1 × 18 مم | رأس مسطح محرك سداسي | ملولبة بالكامل | فولاذ سبائكي كلاس 10.9 أسود حراري (600/عبوة)

I needed a bulk order for a fixture build, and these M6 flat heads fit perfectly. The black oxide finish feels durable and hasn't flaked during install.

I was replacing some jig hardware and these M6-1 x 18mm screws threaded in smoothly without any binding. The black oxide finish looks consistent and clean across all 600 pieces, which is exactly what I needed for a large assembly run.

The hex socket drive seated perfectly on my Allen key, and the thermal black oxide finish looks uniform across all 600 pieces. Threads ran smooth into steel plates without any binding, and the 10.9 alloy steel feels substantially tougher than the cheaper 8.8s I've used before.