براغي تثبيت برأس مقبس بنقطة كوب مع رقعة نايلون 1/2-13 × 1-1/4 بوصة | فولاذ سبائكي (100/عبوة)

Finally found a set screw that actually stays put under vibration, the cup point bites into the shaft nicely. The hex drive made it easy to tighten with a standard wrench in our jig’s tight spot.

The nylon patch works perfectly for keeping these screws locked in place on my jig, even with constant vibrations. The hex socket drive made it easy to tighten them in a tight spot without any stripping. Solid purchase.

I needed to secure a couple of heavy brackets, and these set screws’ hex socket drive let me tighten them down easily in a cramped spot. The cup point really grips the shaft without slipping.