Description3/4″ Nylock Nut used on all SA series of Superlift jack tires. View Parts Reliable WheelRelated Models150-Ton, 16″ (406mm) Superlift Jack SA SeriesView Model100-Ton, 16″ (406mm) Superlift Jack SA SeriesView Model ProductsSuperlift Jack ModelsHeavy Duty Hydraulic JacksElectric Hydraulic JacksJR Series Mobile JacksLow Profile JacksSuperlift Jack Options