material:cast steel or as your requiement certificate:ISO9001:2000,QS-9000,SA8000 ... customers`drawing,samplesCasting materialcast iron,ductile iron,grey iron,stainless steel,alloy steel,aluminum,aluminum alloyStandardISO ASTM GB ASTM DIN JISProcessdrawings-mould ... .We will offer you the best products and reasonable prices cast carbon steel fastener part