M6 x 20mm 內六角肩螺絲 | 內六角頭 | 內六角驅動 | 合金鋼 (25入/包)

Installed a set of these as pivot pins in a small jig I built — the ground shoulder slides beautifully into a bronze bushing with zero play. The hex drive seated them firmly without any cam-out. Exactly what I needed for a clean, repeating mechanical stop.

I needed precise shoulder bolts for a jig build and these fit the bill perfectly—the ground surface made my slide assembly work smoothly right away.

Used a handful of these as pivot pins in a custom jig I'm building, and the fit is incredibly snug with zero wobble. The hex socket drive made installation a breeze, even in tight spaces. These are exactly what I needed for a clean, precise assembly.