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D4/R4-Dual Wheel Kingpinless Series-40,000 lb
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- D4/R4-Dual Wheel Kingpinless Series-40,000 lb
- ASTM1045 steel, drop forged 5/8" thick swivel head, 7" diameter precisely machined raceway of 3/4" diameter hardened steel ball bearings
- Legs are formed from 1/2" thick steel, double welded
- 1-1/4" grade 8 machined axle bolt
- Zinc-plated finish
- Grease fitting on raceway and axle
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