1/4-20 X 5/8" 半狗牙點內六角止付螺絲 | 合金鋼 (250/包)

Installed these as locking set screws for a jig fixture; the half dog point really bites into the soft steel without slipping. Tightened them easily with a hex key even in the recessed hole. Solid hardware for the price.

The hex socket drive grabbed my Allen key perfectly in a cramped spot where a wrench never would've fit, and the half dog point seated exactly where I needed it. A full box of 250 for this price feels like a steal.

I was worried these might strip out in my impact driver, but the hex socket drive held up beautifully through a whole cabinet build. The half dog point makes seating them in tight spots a breeze.