RC-HEX-HUB-12-8 wheel hex hub, 12 mm hex, 8 mm thick, 5 mm bore, 2 mm drive pin

hex-hub

Use it

(import "parts/rc/RC-HEX-HUB-12-8.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; rear pin-slot face z=0; wheel seating face z=thickness.