... , brass,aluminium. Riveting nut(Flat head,Knurled body , Closed end) We use cold forged technique, not only save materials,good looking but ... industrial products. types: flat head ,countersunk head, round body, hex body, open end, closed end, body with ribben, body with groove and so ... nutscrewWe can produce according to customer's drawing requirement closed end rivet nut