6 Inch KP Thermo Rubber Flat Tread Caster Set with 2 Brakes/Swivel Lock 2 Rigid

These Service Caster Series #KP30 Thermoplastic Rubber Flat Tread 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 side lock brake (SLB) which applies a positive locking force against the wheel hub which prevents the wheel from moving freely, or a bolt-on swivel lock (BSL) that when inserted into one of 4 notches found on the swivel raceway converts a swivel caster to rigid for straight-line tracking at any 90 degree angle. Combining both brake types ensures complete immobility over both swivel and wheel on the caster.You may also like 3.5 Inch SS Gray Poly Swivel 1-7/8 Inch Expanding Stem Caster Set 2 Brakes.