براغي HSS من HOLO-KROME 32228 1/2-13 × 1-3/4 بوصة مع نقطة كوب | فولاد سبائكي مع أكسيد أسود حراري (25 / عبوة)

I was nervous about getting a good grip in a blind hole, but the cup point on these set screws bites in perfectly and holds firm. The black oxide finish makes them look clean and professional too.

The hex socket drive grabs my Allen key perfectly, no wobble or stripping even when I torqued them down tight on a shaft alignment job. The thermal black oxide finish also feels properly slick, and the cup point seated firmly without slipping.

The cup point on these set screws really digs into the shaft nicely, and the thermal black oxide finish looks professional. I've used them for a few tough clamping jobs and they haven't stripped or loosened at all.