HOLO-KROME 72262 براغي رأس مقبس 1/2-13 × 8 بوصة | محرك مقبس سداسي | فولاذ سبائكي أكسيد أسود حراري (10 / عبوة)

The black oxide finish on these screws resists rust better than the plain steel ones I used to grab. They threaded cleanly into my jig without binding, and the socket drive made tightening easy. Exactly what I needed for building a heavy-duty fixture.

I've used these on a few tooling fixtures now and they thread in clean without binding. The 8-inch length gives plenty of grip for thick clamping setups, and the black oxide finish has held up well against shop oil and grime.

The black oxide finish on these bolts is much tougher than the standard zinc stuff I've used for heavy fixtures. Threads cut smoothly into the steel plate and they seated perfectly with just a hex key.