3/8-24 X 7/8" 杯端內六角止付螺絲 | 合金鋼 (100 顆/包)

These cup point set screws bite into the shaft really well without slipping, and the hex socket drive makes them easy to tighten even in cramped spots. Perfect for securing a pulley on a small engine project I’ve been working on.

Finally found set screws with a proper hex socket that doesn't strip under high torque—these held firm when I adjusted my lathe's tool post. The cup point bit into the shaft nicely without slipping, and the alloy steel feels tough enough to last through hundreds of setups.

Installed these on a milling machine clamp and the hex socket drive let me torque them down easily in a cramped spot. The cup point bit into the shaft just right with no slipping.