M8 x 20mm 滾花杯端內六角止付螺絲 | 合金鋼 (250個/包)

The hex socket drive made tightening these in a cramped engine bay a breeze, and the knurled cup point grips better than any smooth-tipped screw I've used. They fit perfectly into my jig's threaded holes and haven't budged after hours of vibration. Exactly what I needed for a secure hold.

I needed a hex socket drive for my jig setup and these M8s fit the bill perfectly—the knurled cup point tip locks tight without slipping during adjustments. Used a full 250 count to secure a custom workbench, and so far not a single stripped head or wobble.

These set screws are perfect for locking down pulleys on keyless shafts—the cup point really digs in without slipping. The hex socket drive lets you get them torqued down properly even in awkward spots.