63/64-Extreme Duty Kingpinless Series-20,000 lb
- ASTM1045 steel, drop forged ½" thick swivel head, 4-1/2" diameter precisely machined raceway of 5/8" diameter hardened steel ball bearings
- Legs are formed from 3/8" thick steel, double welded
- 1" grade 5 axle bolt for 3" wide wheels
- 1-1/4" grade 8 machined axle bolt for 4" wide wheels
- Zinc-plated
- Grease fitting on raceway and axle