... 1.material:metal,aluminum,stainless steel 2.over 10 years manufacturer 3.free sample for PEM standard ite metal self clinching ... Stress Relieving.StandardISO,GB,DIN,JIS,ANSI,BSWManufacture ProcessHeading/washer assembly/Threading/Secondary machine/heat treatment/plating/Anti-slipping/Baking/QA ... . metal self-clinching nut for PC boards in hardware manufacturer((TFH,TFHS,HFH,HFHS,HFHB,FHL,FHLS,FH4)