براغي رأس أسطواني M4-0.7 X 45mm | محرك سداسي | ملولبة جزئياً | سبائك فولاذية فئة 12.9 أكسدة سوداء حرارية (400 / عبوة)

The hex socket drive on these 45mm screws gives a really solid grip without any cam-out, and the black oxide finish looks clean on my tooling setup. I've used a full bag across several small fixtures, and every one threaded smoothly.

Used a handful of these for a jig build and the thermal black oxide finish looks sharp and held up fine under clamping pressure. The 45mm length with partial threads gave me plenty of grip without bottoming out. Nice to finally have a full box of 400 instead of rationing the few I had left.

Absolutely solid little fasteners. The hex socket drive seats perfectly with a 3mm key, and the 45mm length was just right for a jig I was building.