RC-BALL-STUD-M3-5 M3 ball stud, 5 mm ball
ball-stud
Use it
(import "parts/rc/RC-BALL-STUD-M3-5.ik" as p)
In a design on ink: ask your agent for it by name, or by what it must be.
Frame of reference
Screw bearing face z=0; threaded stem -z; ball centre +z.