7/16-20 X 3" 杯點內六角螺絲 | 合金鋼 (100/包)

The hex socket drive made torquing these into a tight spot way easier than I expected, and the cup point bit into the shaft cleanly. Pack of 100 means I won't need to reorder for a while, which is a relief.

These set screws are exactly what I needed for a heavy jig I was building; the hex socket let me torque them down securely in a cramped spot. The alloy steel feels tough and the cup points really bite into the shaft. No complaints at all for the price.

I needed extra-long set screws for a motor mount that standard lengths couldn’t reach, and these 3-inch alloy steel fasteners engaged perfectly. The cup point bit into the shaft firmly, and the hex socket held up to torque without stripping.