1/2-13 X 5" 杯端固定螺絲 | 合金鋼 (50/包)

I needed something I could really torque down in a tight spot on my milling vise, and the hex socket drive on these 1/2-13 x 5" cup point screws handled it perfectly. The cup point bites in securely without slipping, and the alloy steel feels solid all the way down.

Finally got these for a heavy-duty jig I’m building, and the hex socket drive made seating them in tight spots effortless. They hold firm under vibration, and the alloy steel feels solid.

The cup point bites into the shaft much better than the flat-tip set screws I've used before, giving me total confidence the pulley won't slip under load. All fifty screws in the pack had clean, sharp threads and the hex drive fit my Allen key perfectly without any wobble.