براغي هولوكروم 60028 #6-32 × 5/8 بوصة رأس أسطواني | محرك سداسي برأس مسطحة | فولاذ سبائكي مؤكسد أسود حراريًا (100/عبوة)

The black oxide finish wiped clean easily and hasn’t shown a speck of rust after a month in my damp garage workshop. They threaded into my jig’s tapped holes without any binding, and the flat heads sit dead level with the surface.

The flat heads sit perfectly flush in my jig’s countersunk holes, and the socket drive grips securely without stripping even in tight spots. The thermal black oxide finish feels rugged and consistent across all 100 pieces, which is exactly what I needed for a repeat precision assembly run.

I needed these for a jig I was building, and the flat head hex socket drive made installation a breeze even in tight spots. They seated perfectly flush, which was exactly what I needed for the precision assembly.