3/8-16 X 3" براغي ذات رأس أسطواني | محرك سداسي | صناعة أمريكية | فولاذ سبائكي مع أكسيد أسود حراري (50/عبوة)

The black oxide coating on these screws gives them a nice, uniform finish that resists rust well in my shop. They threaded cleanly into my jig without any binding or galling, which I appreciate. For precision assemblies, these are a solid choice.

I needed some solid screws for a custom jig I was building, and these cap screws fit perfectly with their hex socket drive. The 50-pack gives plenty of spares, and the alloy steel feels really sturdy for the price.

The black oxide finish held up perfectly when I torqued these down on a tooling fixture—no galling at all. Threads were clean and started smoothly in a tapped hole.