Flange Bolts, Basic Material Steel, Material Grade Alloy Steel, Fastener Finish Plain, Dia./Thread Size 3/8 In.-24, Fastener Length 1 in, Fastener Thread Direction Right Hand, Fastener Thread Type UNF (Fine), Fastener Thread Style Fully Threaded, Fastener Industry Standards ASTM A574, IFI-115, Thread Length 1 in, Head Height 3/8 in, Head Width 3/8 in, Flange Dia. 9/16 in, Proof Load 140,000 psi, Tensile Strength 170,000 psi, Rockwell Hardness HRC37, Package Quantity 25