Metric Structural Bolt Carbon Steel Fastener Finish Hot Dipped Galvanized Dia/Thread Size M20-2.50 Fastener Length 45 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 25