HOLO-KROME 09035 براغي كتف مقبس 12 مم × 25 مم | رأس مقبس | محرك مقبس | فولاذ سبائكي مؤكسد أسود حراري (25/عبوة)

I used these as precision axles in a small robotics project, and the 12mm shoulder diameter fits perfectly into my bearings with zero play. The black oxide finish also held up well against light grime.

Installed these in a small jig I'm building and the precision ground shoulder spins smoothly on the bearing surface, no wobble at all. The hex drive grabbed cleanly with my Allen key, too.

These are exactly what I needed for a custom jig build — the hex socket drive made installation quick and the black oxide finish looks clean. Fit and finish are spot on, no wobble in the shoulder.