M20 X 80mm 杯點內六角螺絲 | 合金鋼 (25 入/包)

The hex socket drive made tightening these into tight spots so much easier than standard screws. The alloy steel feels solid, and the cup point tip seated perfectly. Exactly what I needed for a secure hold.

Used these to lock down a milling fixture that kept vibrating loose, and the cup point bites into the steel like it means it. The hex drive held up under a breaker bar without stripping, which says a lot for a 25-pack at this price. Genuinely impressed with the alloy hardness.

I needed a high-torque screw for a machine alignment job, and these M20 cup point set screws in alloy steel held firmly without any slippage. The cup point tip really bites into the surface, giving me confidence it won't back out under vibration.