... Surface: plain, black, zinc plated 3. Grade,6.8,8.8. 12.9 DIN931&DIN934 boltHex bolt 8.8 din933 and din931 black1) Hex bolt ... 8 8.84) Materail: C1010, Q235, 35#, 45#5) Surface: plain, black, zinc plated (yellow, blue)6) Packing: 25kg/carton, ... -300 M36*90-3001. Material: 35k,q235, c1010 2. Surface: Black, ZP, HDG 3. Grade: 4.8,6.8,8. ... or L/C Min Order1 Tons DIN931&DIN934 bolt nut hex bolts and hex nuts