Caster Sockets and Brackets

Measure the inside diameter (for round tubing) or inside width and height (for square or rectangular tubing) of the leg or frame where the socket will be inserted. Then match those dimensions to the socket's outside profile listed in the product specifications. A snug press-fit is what holds the socket in place.

Grip ring sockets have a smooth bore that accepts a caster stem with a grip ring collar. The ring compresses during insertion and then expands to lock the stem in place, allowing easy removal and reinstallation. Threaded sockets have internal threads that mate with a threaded caster stem for a more permanent, vibration-resistant connection.

Yes. Metal sockets, typically steel or zinc-plated steel, handle higher loads and provide greater durability than nylon in demanding environments. They are recommended for institutional furniture, medical equipment, and any application where the caster will bear significant weight or see frequent stem removal and reinsertion.

We carry sockets in a wide range of sizes, including some designed for tapered or specialty profiles. If you cannot find an exact match in our standard catalog, contact us with the leg dimensions and a photo. We can often recommend an adapter or alternative solution.

Caster Central stocks sockets in round, square, and rectangular profiles to fit the most common tubing and leg shapes used in furniture, hospitality, medical, and light industrial applications. Round sockets are sized by inside diameter to match standard tubing sizes from 7/8" through 1-5/8" and beyond. Square and rectangular sockets correspond to common square tubing dimensions. Each socket is manufactured from high-impact nylon or metal depending on the load requirements and intended environment.

To select the correct socket, measure the inside dimensions of your tubing or leg opening. The socket's outside profile must match this opening for a secure press-fit. Next, confirm the stem type and diameter of your caster. Grip ring stems require a socket with an open bore, while threaded stems need a socket with internal threads that match the stem's thread size. Getting both measurements right is essential for a stable, long-lasting installation.