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:customers demand 1. Standards: DIN ,ANSI/ASME, BS, GB, JIS, Non-standard2. Material: Carbon steel, stainless steel, alloys steel.3. Class: 4.8,8.8,10.9,12.9.etc4. Surface: plain, zinc plated, black oxide, hot dip galv.etc.5. Size:2mm-68mm6. Packing: in bulk,15-25kgs per carton, then on ...