براغي نقطة كوب #1/4-20 × 1 بوصة | ستانلس ستيل 18/8 (70/عبوة)

Used a handful of these to lock a pulley onto a motor shaft and they bit in perfectly with the cup point. The 18-8 stainless feels solid and the hex socket drive grips the allen key without stripping. At 70 per pack, I’ve got plenty left for the next project.

The cup point on these set screws gave me a much better grip on my pulley shaft than standard flat points do. I used a full pack securing collars and they haven't budged since. Great value for a bulk pack of stainless hardware.

I needed something reliable for securing a pulley to a motor shaft, and these cup point screws really lock in place without slipping. The 1/4-20 threads cut cleanly into the metal, and the 70-piece pack should last me through several projects.