براغي رأس أسطواني M10-1.5 X 50mm | محرك سداسي | ملولبة جزئيًا | سبائك فولاذية فئة 12.9 بأكسيد أسود حراري (100 / عبوة)

The black oxide finish looks sharp on the workbench and seems to resist rust well so far. Threads are clean and the hex socket fits a 5mm Allen key with zero wobble, and I’ve torqued a few down hard without stripping. Good pack for the price.

Picked up a pack for some jig building and the 12.9 alloy steel feels noticeably tougher than the 10.9 grade I've used before. The hex socket drive made tightening them down in tight spots far easier than I expected.

The black oxide finish makes these screws look great on my precision assembly table, and the hex socket drive grips firmly without stripping. They threaded smoothly into tapped holes, no binding or hesitation.