RWM's 76 series caster features the patented kingpinless design and that has proven itself to be the best solution for demanding applications. This patented kingpinless single ball bearing precision machined raceway hardened to 53 Rockwell C minimum. This is the caster design that all others are now copying because it is simply unmatched in extending service life, reducing all possible causes for caster failure. The 76 series offers up to 7000 lb. capacity and is available with a wide variety of wheels. All swivel sections are supplied with a lubrication fitting for field maintenance. The 76 series is case hardened for long service life. It will not crack like through hardened or induction hardened construction provided by other caster manufacturers. The 76 series typical applications include dollies, utility carts, tow line and platform trucks. It is also ideal for tow lines, shock load applications and abusive conditions, production line dollies and trucks used in various industries including but not limited to: boat and ship molding and building, automotive, aerospace, metal fabricating, metal forging, heavy machinery and equipment, military equipment, mobile homes, etc. Tractor pulled trailers, extreme duty platform trucks and material handling carts, air cargo and ground support equipment, storage tanks, gantries and heavy duty processing equipment, coliseum and gymnasium equipment, shipping/receiving carts, warehousing and freight terminal dollies and carts, and countless other heavy duty applications. This caster is the mainstay in tire manufacturing. 3/4" Diameter axle bolt with lock or slotted nut as required and 3" tread wheel. Mounting plate size is 5-1/4" x 7-1/4" x 3/8".