These are the 4-40 Heavy Duty Rod Ends from RPM. These rod ends snap onto a metal ball and are threaded onto a rod to connect two parts of a linkage together.
Molded in neon blue plastic.
Twelve 4-40 Size Heavy Duty Rod Ends from RPM.
Threading on to a 4-40 size threaded rod and snapping other end on to
a 4-40 metal ball.
length: 3/4 inch (19mm)
Width at ball end: 1/4 inch (6mm)
description revised by: DB August 1, 2015