Threaded, non-threaded and adapter stem casters from trusted manufacturers are a quick and easy way to attach wheels to wire shelving, office furniture, carts, hand trucks, and anything with the right type of fastener opening. Stem adapter stem casters are great for wire shelving units where the caster must be attached into a hollow tube or pipe. The standard threaded stem sizes and non-threaded grip ring sizes are here, but for special cases or specific stem sizes please call us and we will find the industrial stem caster that is right for you.