براغي رأس مقبس M10-1.5 × 50 مم | محرك سداسي منخفض الرأس | ملولبة جزئيًا | فئة 10.9 فولاذ سبائكي أسود حراري (50 / عبوة)

These are holding up perfectly on a tooling fixture I just finished building; the 10.9 alloy steel feels noticeably tougher than standard hardware. The partially threaded shank gave me just the right grip depth without bottoming out in the blind hole.

I needed some strong fasteners for a jig I was building, and these Class 10.9 screws handled the torque perfectly. The black oxide finish looks clean and resists oil stains on the workbench.

The partial threading made these perfect for clamping applications where I needed grip without bottoming out against the surface. The hex socket drive seated cleanly with no slipping, and the black oxide finish feels robust enough for repeated use in jigs.