Hex Head Cap Screw System of Measurement Metric Basic Material Steel Material Grade Class 8.8 Fastener Finish Plain Dia./Thread Size M39-4.00 Fastener Length 120 mm Fastener Thread Direction Right Hand Fastener Thread Type Metric Coarse Fastener Thread Style Partially Threaded Fastener Industry Standards DIN 931 Head Type Hex Min Thread Length 84 mm Head Height 25 mm Head Width 60 mm