'Flange Bolt, System of Measurement Inch, Basic Material Steel, Material Grade Grade 8, Fastener Finish Plain, Head Type - Bolts Hex Flange, Dia./Thread Size 3/8 In.-16, Fastener Length 2-1/4 In., Fastener Thread Direction Right Hand, Fastener Thread Type UNC (Coarse), Fastener Thread Style Partially Threaded, IFI-111, Min. Thread Length 1 In., Head Height 3/8 In., Head Width 9/16 In., Flange Dia. 13/16 In., Proof Load 120,000 psi, Tensile Strength 150,000 psi, Rockwell Hardness C33 to C39'