M6 X 40mm 杯點內六角止付螺絲 | 合金鋼 (250 顆/包)

The cup point really digs in nicely on my aluminum pulley, and the hex drive makes adjusting them in tight spots much easier. These screws held firm on the first try without any stripping. The whole pack was consistent in thread quality, which I appreciate.

I needed to lock a sprocket onto a shaft and these M6 cup point screws really bite into the metal without slipping. The hex socket makes it easy to tighten them with just an Allen key, even in awkward spots. Solid hardware for the price.

The cup point digs in nicely on hard steel, no slipping even when I torqued them down hard with the hex driver. These 250-packs are the only way to go for production runs, and the alloy steel threads held up without stripping on the third reuse.