Caster Socket (Round); Grip Ring: .907" O.D. x .7/16" I.D.; Plastic (dark); for 18 ga 1" Round Tubing w/ .902" ID; fits 7/16 connectors up to 1-7/16 long (Shepherd 43403)
Determine the socket you need by measuring the Inside Diameter of the tubing and matching that to the outside diameter of the socket. The sockets are usually quite long-lived. It"s only function is to keep the casters (or glides) from falling out when the application is lifted. Most of these are for hollow tubing, wood or weld-on applications. Various styles are for grip ring stems, grip neck stems and threaded stems.
Plastic wheels are lightweight, economical, with a hard tread that withstands impacts and abusive conditions. They provide floor protection, are non-marking and non-conductive. Resistant to water, oils, grease, solvents and many chemicals.