1.Auto parts material is steel 20 or Q235 ... material is usually steel 20, coated yellow Zinc. Commodityauto parts, hose fittingsMaterialMild steel, stainless steel, aluminum, copperThread standardsMetric ... etcStylesMale fitting, female fitting, banjo, nut, boltMaking technicsRivet; welding joint; wedge; cold heading; casting,OtherMetal accessories, rubber accessories, plastic accessories auto parts