1.achieved ISO9001:2000 2.Standards:DIN,ANSI/ASME,BS,GB,JIS,Non-standard 3.Class:4.8,8.8,10.9,12.9 4.Surface ... property of Grade 8.8 and 9.8.3. Bolt used on guardrail panel of expressway with mechanical property of Grade 4.8 and 8.8.4. Elevator ... property of Grade 4.8, 8.8, 10.9 and ANSI Grade 2, 5 and 8. 7. Various nuts, flat gaskets, spring washers, mechanical bolts, tapping screws ...