'Hex Head Cap Screw, System of Measurement Inch, Head Type Hex, Dia./Thread Size 1/2 In.-20, Thread Type UNF (Fine), Fastener Length 2-1/2 In., Min. Thread Length 1-1/4 In., Basic Material Steel, Screw Grade/Class Grade 5, Fastener Finish Plain, Thread Style Partially Threaded, Thread Direction Right Hand, Head Height 5/16 In., Head Width 3/4 In., Proof Load 74,000 to 85,000 psi, Screw Industry Standards ASME B18.2.1, Package Quantity 10'