HOLO-KROME 73126 براغي رأس سوكيت 7/16-20 X 1-1/2" | محرك سوكيت سداسي | فولاذ سبائكي معالجة حرارياً بأكسيد أسود (50 / عبوة)

The black oxide finish on these screws is flawless—no flaking or uneven spots even after wrenching them into my jig. They torqued down smoothly in the precision assembly I’m building, and the 50-count box will last me a good while.

Installing these on some heavy machinery jigs and the threading was clean right out of the box. The black oxide finish hasn't chipped or worn where I’ve tightened them down, which is a nice surprise. Exactly the quality I needed for precise assembly work.

I’ve used these for a die set repair, and the black oxide finish held up well without any galling during assembly. The hex drive engagement felt solid, no wobble or stripping.