... 1.material:metal,aluminum,stainless steel 2.over 10 years manufacturer 3.free sample for PEM standard ite metal self clinching ... nut for PC board in hardware manufacturerA: SpecificationMaterial:stainless steel,carbon steel,aluminumStandard:PEM ... orders. metal self-clinching nut for PC boards in hardware manufacturer((TFH,TFHS,HFH,HFHS,HFHB,FHL,FHLS,FH4)