M10 X 40mm 內六角肩螺絲 | 內六角頭 | 六角驅動 | 18/8 不鏽鋼 (25顆/包)

The ground shoulder sat perfectly flush in my bearing mount—no wobble at all, and the hex drive made tightening them a breeze. These M10s are solid enough for a real axle setup, and the 18/8 stainless finish looks clean on the machine.

Used a couple as pivot stops on a jig I'm building and the shoulder fit snugly without any play. The hex drive made tightening them down simple even in tight spaces.

The ground shoulder slid into my bearing mount with zero wobble, and the hex socket drove cleanly without stripping. Twenty-five of these in 18/8 stainless should outlast the machine they're holding together.