براغي HOLO-KROME 32192 7/16-14 × 3/8 بوصة ذات رأس مقبس كوبي | سبيكة فولاذية مؤكسدة حرارياً باللون الأسود (100/عبوة)

The cup point bit down exactly where I needed it on the shaft, and the black oxide finish hasn't shown any wear after a few weeks of vibration. Hex socket drive made torquing them in a tight spot way easier than I expected.

Installed these to hold a pulley on a motor shaft and the hex socket drive made tightening them in a tight spot much easier. The cup point bit into the shaft cleanly without slipping, and the 100-count pack should last me through many projects.

The black oxide finish on these screws is really consistent and clean, which made them look great in a tight spot on my shaft clamp setup. They threaded in smoothly and held firm without any stripping issues, just what I needed for the job.