M10 X 40mm 內六角肩螺絲 | 內六角頭 | 內六角驅動 | 合金鋼 (25個/包)

Used two of these as axles for a custom hinge project and the precision-ground shoulder made the rotation buttery smooth. The hex socket drive seated perfectly with no stripping.

I needed solid pivot screws for a jig, and the precision-ground shoulder on these M10s fits perfectly without any binding. The hex socket drive made installation straightforward, and the alloy steel feels tougher than the standard hardware I've used before.

The hex socket drive made these effortless to torque down in tight spots, and the precision-ground shoulder slid into my bearing assembly with zero play. For 25 pieces at this price, the alloy steel finish looks clean and uniform across the whole batch.