Rivet nut (falt head,round body). Material:Stainless Steel Specification:M6,M8,M10 Rivet nut (falt head,round body)we use cold forged technique ... . types: flat head ,countersunk head, round body, hex body, open end, closed end, body with ribben, body with groove and so on . also ... ,1/4,5/32 3/16,5/16. material: steel, stainless steel, brass,aluminium. stainless steel round rivet nut