... :Stainless Steel. stainless steel blind flat head half hex rivet nutspecification: M4-M12type: 1. head can be ... thin , countersunk2. body can be half hex , round3. hex is half hex , inner and outer hexwe use cold forged ... types: flat head ,countersunk head, round body, hex body, open end, closed end, body with ribben, ... according to your drawing if we can do . specification:M3 ,M4 ,M5, M6, M8 ,M10 ,M12, ...