1.1 million kinds of brake hose fittings 2.Material: steel 20# ... is usually steel 20, coated yellow Zinc. Commodityhydraulic hose fittingsMaterialMild steel, stainless steel, aluminium, copperThread standardsMetric: M10X1 ... nut, bolt, accessoriesMaking technicsRivet, welding joint, wedge, cold heading, cast,OtherMetal accessories, rubber accessories, plastic accessories hydraulic hose pipe fittings