براغي رأس كبس M8-1 X 35mm بمقبس سداسي | محرك مقبس سداسي | ملولبة بالكامل | فولاذ سبائكي فئة 12.9 أكسيد أسود حراري (200 / عبوة)

The black oxide finish on these screws held up well during assembly with no flaking or residue. Thread engagement was smooth and consistent across the entire 200-piece pack, making them ideal for tooling fixtures.

These M8 screws fit perfectly in my jig fixture, the hex socket drive made installation quick with no slipping. The 12.9 grade alloy steel feels extremely strong, definitely heavy-duty for precision work.

The black oxide coating on these screws seems more uniform than other fasteners I've tried, which should help with corrosion resistance in my shop jigs. They seated cleanly with a hex key, and the 35mm length was perfect for the fixture I needed to build.