... 2. material: steel, 3. finish: zinc non-standard flat head socket rivets with internal thread1.Standards:DIN ,ANSI/ASME,BS,GB,JIS,Non ... , 8.8, 10.9 and ANSI Grade 2, 5 and 8.7. Various nuts, flat gaskets, spring washers, mechanical bolts, tapping ... customers. Jinrui has passed ISO9001:2008international quality system certification in 2001 and TS16949 automobile quality control system in 2012. We also ...