Service Caster conductive rigid caster with 3-1/2 inch flat, conductive thermoplastic rubber tread bonded to polyolefin core. Featuring ball bearings in wheel, a heat treated ball bearing raceway, and bright zinc plated finish. These casters are ideal for light and medium duty assembly carts, electrical equipment, and any application requiring conductive caster properties. Wheels meet the requirements of federal specification FF-C-88C. This specification requires an average electrical resistance of less than 250,000 ohms.
Wheel size: 3-1/2" x 1-1/4"
Wheel hardness: 75(+ or- 5) Durometer Shore A Scale
Top plate size: 2-1/2" x 3-5/8"
Bolt hole pattern: 1-3/4" x 2-7/8" to 3"
Bolt size: 5/16" (hardware not included)
Mounting Height: 4-5/8"
225 pound capacity per caster
Tread hardness: 70 +/- 5 Shore (A) Durometer