براغي رأس مقبس 1/2-20 X 2-1/4" | محرك مقبس سداسي | صناعة أمريكية | فولاذ سبائكي مع أكسيد أسود حراري (200 / عبوة)

The black oxide finish on these screws is holding up perfectly through my jig assembly work. They drive in smooth with a hex key and the threads are clean right out of the bag. Exactly what I needed for a heavy-duty fixture.

I needed exactly 200 screws for a big tooling project, and these black oxide ones fit the depth I needed with the 2-1/4" length. The hex socket stripped less than some cheaper Chinese sets I've tried.

These have gone into several jigs at the shop and the thermal black oxide finish is holding up great without any rust. The hex socket drive seated perfectly on every single one, and the alloy steel feels solid under torque.