RC-WHEEL-NUT-M4 M4 serrated flanged wheel nut, 7 mm hex

wheel-nut

Use it

(import "parts/rc/RC-WHEEL-NUT-M4.ik" as p)

In a design on ink: ask your agent for it by name, or by what it must be.

Frame of reference

Axle +z; flange bearing underside z=0; body +z.