براغي رأس مقبس 1/2-20 × 2-1/2 بوصة | رأس زر محرك سداسي | ملولبة بالكامل | فولاذ سبائكي أسود حراري (50 / عبوة)

The black oxide finish feels tough and the hex socket drove in cleanly with zero stripping on all fifty pieces. I’ve got these holding a precision fixture on my mill table and they haven’t budged after a week of heavy use.

Used these to secure a heavy jig on my mill table, and the full threading along the entire 2-1/2 inch length gave me plenty of grip. The hex socket made installation quick with just an Allen key, and the black oxide finish looks clean without any chips or peeling after tightening.

I needed these for a jig I was building, and the hex socket drive made installation a breeze with my T-handle wrench. The black oxide finish is smooth and uniform across all fifty screws.