Riveting nut(Flat head,Knurled body , Closed end) Specification:M3-M12 material: steel, stainless steel, brass,aluminium. Riveting nut(Flat head, ... can produce according to customer's drawing. specification:M3 ,M4 ,M5, M6, M8 ,M10 ,M12, inch: 1/2,3/8,1/4 ...