Casters with a 1/2" threaded stem mount used where secure attachment, height adjustment, or positive retention is required. Commonly specified for carts, fixtures, mobile equipment, and OEM assemblies.

Stem size

1/2" threaded stem

Wheel diameters

3"–5"

Typical capacity

Up to ~300 lbs per caster (model dependent)

Mounting advantage

Adjustable height, secure retention, easy replacement

Wheel material options

Thermoplastic rubber (TPR)

TPR wheels provide quiet rolling, floor protection, and non-marking performance. Suitable for indoor environments where debris, cords, or small obstacles may be present.

Polyurethane

Polyurethane wheels offer non-marking performance with higher load capacity than rubber-based materials and improved resistance to flat-spotting under static loads.

Phenolic

Phenolic wheels provide increased load capacity and resistance to oils and solvents while remaining non-metallic. Best suited for smooth, dry floors.

Iron and metal wheels

Iron wheel options including gray iron and black iron are used where floor protection is not required and maximum durability or specific aesthetic requirements are desired. Not recommended for finished or sensitive floors.

Solid polyurethane (blue)

Solid polyurethane wheels provide high load capacity, chemical resistance, and resistance to flat-spotting. Common in cleanroom, laboratory, and washdown-adjacent environments.