براغي تثبيت بمقبس سداسي برأس كوب 1/2-13 × 1-1/2 بوصة | فولاذ سبائكي مطلي بالزنك (100 عبوة)

The cup point on these screws bites firmly into the shaft without stripping, even under significant tightening torque. I’ve used a dozen so far in a machinery adjustment project and they’ve held fast.

Used these to secure a collar on a steel shaft, and the cup point really bit in nicely without stripping. The zinc coating held up fine under my wrench, no rust after a week in a damp shop. Solid hold for the price.

Was a little worried about the hex drive stripping under load, but these cup point screws bit into the shaft solidly and held tight. The zinc plating looks clean and even, and a full 100-pack means I've got plenty left for the next job.