... Hex bolts,Finish black ,C 1035,heat treated grade 8.8Sizes: M6--M30 with different lengthsStandard: DIN933 ... forged, sizes: M20-M56; 3/4”- 2-1/4”Grade:4 & 6 & 8 Material: Mild Steel & middle carbon ... different lengthsStandard: DIN933/931 DIN 603 DIN558 ISO4017 ISO4018; Grade: 4.8 & 8.8Material: Mild Steel & middle ... to M36 with different length (80mm to 3000mm)Grade 4.8 6) Processes: Cold forging and Hot ...