براغي تثبيت بنقطة كوب مقاس 1/2-13 × 1-1/4 بوصة | فولاذ سبائكي (50/عبوة)

The hex drive seated cleanly without stripping, and the alloy steel feels dense enough for real holding torque. Used a few to lock a gear hub onto a shaft—they cinched down tight and haven’t budged since. Slight annoyance that the package lacks a size label, but the threads are precise.

Bought these to hold a pulley on a motor shaft, and the cup point really bites in once you get the torque on them. The whole package of fifty came well-protected, and the alloy steel feels plenty tough for the job. No stripped heads on the first few I’ve used, which is more than I can say for some s

The cup point digs into the shaft exactly as it should, and all fifty threads chased clean without a single burr. Used a dozen on a gear hub so far and nothing's budged a thousandth.