5/8-11 x 2-1/2" 尼龍粒杯點內六角止付螺絲 | 合金鋼 (50/包)

The hex socket drive really makes a difference when you're wrenching in a cramped spot—no stripped heads and plenty of torque. The nylon pellet tips seat the screw nicely without chewing up the surface, and the alloy steel feels solid. Just what I needed for a stubborn alignment job.

These things hold firm even under heavy vibration. I used them on a piece of industrial machinery and the nylon pellet presses tight without marring the shaft. A solid upgrade from plain set screws.

Cup point bit into the workpiece exactly as it should, and the hex socket drive took my torque wrench without rounding off. Fifty pieces for this price feels like a steal for alloy steel. These grabbed tight on the first pass, and the nylon pellet kept the shaft from marring. I’ve used cheaper sets