براغي ذات رأس أسطواني M5-0.8 × 45 مم | محرك سداسي | ملولبة جزئيًا | فولاذ سبائكي فئة 12.9 مع أسود حراري أكسيدي (400 / عبوة)

The black oxide finish on these screws looks professional and resists rust better than expected. Used a handful in a precision tooling setup and the hex socket drive seated perfectly without stripping. For the price per pack, you get solid Class 12.9 alloy steel that feels durable.

I needed these for a jig I'm building, and the 45mm length was exactly what I needed for the clamping depth. The hex socket drive made installation quick without any cam-out issues.

The black oxide finish looks uniformly applied across all 400 heads, which matters when they're visible on a precision assembly. Thread engagement on the partially threaded section is clean and consistent, and the hex socket drive seated my Allen key with no slop. These are solid for the price per p