4″ Rigid Phenolic Top Plate 4-1/2″ x 6-1/4″ 25PH40 Heat treated kingpin to enhance the load capacity Zinc plated finish is attractive & corrosion resistant
4″ Rigid Poly Steel Top Plate 4-1/2″ x 6-1/4″ 25PU40 Heat treated kingpin to enhance the load capacity Zinc plated finish is attractive & corrosion resistant
4″ Swivel Phenolic Top Plate 4-1/2″ x 6-1/4″ 15PH40 Heat treated kingpin to enhance the load capacity Zinc plated finish is attractive & corrosion resistant
4″ Swivel Poly Steel Top Plate 4-1/2″ x 6-1/2″ 15PU40 Heat treated kingpin to enhance the load capacity Zinc plated finish is attractive & corrosion resistant
