Hexagon Head Bolts
Standard|Specification: DIN 931/933 Material: BS 3692/ISO 898-1 Surface Finish: Black Oxide, Zinc Plated Hot Dipped Galvanized.
Heavy Hexagon Bolt
Standard Specification: ANSI/ASME B 18.2.1/B 18.2.37M Material: Medium Carbon Steel / Alloy Steel Surface Finish: Black Oxide, Zinc Plated Hot Dipped Galvanized.