براغي رأس مقبس M5-0.8 × 70 مم | محرك سداسي | ملولبة جزئيًا | فئة 12.9 فولاذ سبائكي مؤكسد أسود حراريًا (200 / عبوة)

The 200-count pack is perfect for my jig builds, and the hex socket drive fits my bits securely without stripping. I was surprised how clean the black oxide finish is — no burs or rough edges right out of the bag.

For a 12.9-grade screw this length, the black oxide finish is even and consistent across all 200 pieces. They seated perfectly in my jig fixture without any wobble, and the hex socket grabbed cleanly with no stripping.

Was replacing the bolts on a homemade press jig and these 12.9 alloy steel screws threaded in smoothly without any binding. The black oxide finish looks clean and should resist rust in my shop environment.