براغي رأس كبس 3/8-24 × 2-1/4 بوصة | محرك سداسي | صنع في أمريكا | سبيكة فولاذ أكسيد أسود حراري (500/عبوة)

Installed these in a jig I'm building and the hex drive engaged perfectly without slipping. The black oxide finish makes them look clean and professional on the fixture.

I was tired of cheap bolts rounding out on my jig, so I grabbed these socket cap screws. The black oxide finish looks great and they threaded perfectly into my fixture without any binding. Exactly what I needed for a solid hold.

These hit a clean 30 foot-pounds without stripping, and the black oxide finish slides right into hardened steel jig plates. I needed a full 500-pack for a production run, and every single screw threaded perfectly with no burs or inconsistencies.