... , brass,aluminium. Riveting nut(Flat head,Knurled body , Closed end) We use cold forged technique, not only save materials,good ... looking but also loading force, shearing force and torque force all reach international standard. Our products are widely used ... types: flat head ,countersunk head, round body, hex body, open end, closed end, body with ribben, body with groove and so on . also ...