... material is usually steel 20, coated yellow Zinc. Commoditystainless steel pipe fittingsMaterialMild steel, stainless steel, aluminum, copperThread standardsMetric: M10X1, M10X1.25 ... , boltMaking technicsRivet; welding joint; wedge; cold heading; casting,OtherMetal accessories, rubber accessories, plastic accessories stainless steel pipe fittings