Leveling Mount, PolyMount Type, Thread Size 5/8-11, Base Dia 4 In, Load Capacity 6000 Lb, Height 1 7/8 In, Hex 7/8 In, Construction 303 Stainless Steel, Includes Jam Nut Boltless Leveling MountsPolyMount Polyglass-fill nylon base is corrosion-resistant. Lag holes allow permanent floor mounting. For washdown applications.