4 Inch 316SS Thermo Flat Tread Caster Set with Roller Bearings 2 Brakes 2 Rigid

These Service Caster Series #30 Thermoplastic Rubber Flat Tread on Polyolefin Core casters offer various wheel sizes and mounting heights: 4” wheel: 5-5/8” mounting height; 5” wheel: 6-1/2” mounting height; 6” wheel: 7-1/2” mounting height; 8” wheel: 9-1/2” mounting height. Weight Capacity: 4": 300 lbs Capacity/Caster, 5": 350 lbs Capacity/Caster, 6": 500 lbs. Capacity/Caster, and 8": 600 lbs Capacity/Caster Top plate measures at 4" x 4-1/2" with a bolt hole pattern of 2-5/8" x 3-5/8" to 3" x 3" and can either be bolted or welded on. Brake options include a top lock brake (TLB), total lock brake (TTL), or bolt-on swivel lock (BSL). The TLB locks only the wheel by applying force to the tread. The TTL locks both the wheel and swivel for a stationary position. The BSL, when inserted into one of four notches on the swivel raceway, converts a swivel caster into a rigid caster for straight-line movement at 90-degree angles.