براغي هولو-كروم 33126 1/2-20 × 1/2 بوصة بنقطة كوب من الفولاذ السبائكي بطبقة أكسيد أسود حراري (100 / عبوة)

The hex socket drive seated perfectly on my wrench, and the cup point bit into the shaft exactly where I needed it. These 1/2-20 set screws held firm under vibration, and the black oxide finish hasn't chipped after a week of assembly work.

The hex socket drive made installation with an Allen key really easy, and the black oxide finish looks clean on my shaft assembly. These cup point screws held my clamping components securely without any slipping.

The black oxide finish on these set screws gives them a solid, non-reflective look that's held up well in a damp shop environment. I've used maybe thirty of them so far for clamping pulleys on shafts, and the cup point bites down securely without stripping. Four stars only because the package didn't