Hex Bolt, Hex Cap ScrewStandard: ANSI/ASME B18.2.1    DIN931, DIN933, DIN960, DIN961, DIN7990Grade: 2, 5 & 8. ASTM A307 grade A, Metric Bolt-Class 4.8, 8.8, 10.9, 12.9Thread UNC, UNFHex Structural Bolt  A325 or A490
Standard: ANSI/ASME B18.2.1   DIN6914
Grade:  ASTM A325 and A490,  Metric Bolt -Class 10.9, 12.9
ASTM A325 Structural Bolts, Steel, Heat Treated,120/105 kis Minimum Tensile Strength 
ASTM A490 Structural Bolts, Alloy Steel, Heat Treated,150 ksi Minimum Tensile Strength