Our co***ny manufacturing all kinds of rivet nuts,the main products are flat head(ABK/HB),countersunk head(ABK/HB),hexagon shat(ABK/HB) and so on¡£The specification are m3-m12£¬systerm of US 5/16¡¢1/4UNC¡¢3/16¡¢10-24¡¢10-32¡¢8-32,systerm of British 3/16-24¡¢3/16 and so on