M12 x 80mm 內六角肩螺絲 | 內六角頭 | 內六角驅動 | 合金鋼（25件/包）

The precision-ground shoulder on these M12 screws is noticeably smoother than typical bolts, making them work perfectly as pivot pins for a small jig I built. They seated firmly with my hex driver and the 80mm length gave just enough thread engagement. Solid hardware for the price.

Finally found M12 shoulder screws with a proper 80mm length for my jig build—the precision-ground shoulder made alignment dead simple. These alloy steel screws feel tough and the hex socket drive took my wrench without slipping. Happy with the 25-pack value.

Machined tolerances on the shoulder are impressively tight—they slid into my bearing bores with zero play. The hex socket drove true and the alloy steel feels properly hardened, so these will definitely outlast the cheap stuff I've used before.