DIN931 DIN934 bolt 1. Material: 35k,q235, c1010 2. Surface: plain, black, zinc ... 3. Grade,6.8,8.8. 12.9 DIN931 DIN934 bolt 1. Material: 35k,q235, c1010 2. Surface: plain, black, zinc ... ,8.8. 12.9 DIN931&DIN934 boltHex bolt 8.8 din933 and din931 black1) Hex bolt DIN933/DIN931 ISO4017/ISO4014, DIN960/DIN9612 ... -250 M27*90-270 M30*90-300 M36*90-300 bolt