Metric, Structural Bolt, Carbon Steel, Fastener Finish Hot Dipped Galvanized, Dia./Thread Size M20-2.50, Fastener Length 160 mm, Fastener Thread Type Metric Coarse, Fastener Industry Standards EN 14399-4, Thread Length 33 mm, Fastener Thread Direction Right Hand, Head Dia. 32 mm, Head Height 13 mm, Tensile Strength (PSI) 1,000 N/sq mm, Rockwell Hardness C32 to C39, Package Quantity 20