'Hex Head Cap Screw, System of Measurement Inch, Head Type Hex Flange, Dia./Thread Size 1/2 In.-20, Thread Type UNF (Fine), Fastener Length 1-3/4 In., Min. Thread Length 1-1/4 In., Basic Material Steel, Screw Grade/Class Grade 8, Fastener Finish Plain, Thread Style Partially Threaded, Thread Direction Right Hand, Head Height 33/64 In., Head Width 3/4 In., Flange Dia. 1-5/64 In., Proof Load 120,000 psi, Screw Industry Standards IFI-111, Package Quantity 25'