براغي رأس كبس بمقبس سداسي M5-0.8 × 14 مم | محرك سداسي | ملولبة بالكامل | فولاذ سبائكي من الفئة 8.8 بأكسيد أسود حراري (600 / عبوة)

The hex socket drive on these screws is nicely machined, so my hex wrench seats perfectly without any wobble. The black oxide finish looks clean and consistent across all 600 pieces, and they threaded smoothly into the aluminum jig I'm building.

Was a bit concerned about the black oxide coating holding up, but after installing twenty of these in a jig fixture, it hasn't chipped or flaked at all. The hex socket drive is crisp and doesn't strip out easily.

Just finished a batch of precision tooling mounts, and these screws threaded smoothly into the hardened steel without any stripping. The black oxide finish is consistent across all 600 pieces, no rough edges to speak of.