'Hex Head Cap Screw, System of Measurement Inch, Head Type Hex, Dia./Thread Size 1/4 In.-20, Thread Type UNC (Coarse), Fastener Length 2-1/2 In., Min. Thread Length 3/4 In., Basic Material Steel, Screw Grade/Class Grade 8, Fastener Finish Zinc Yellow, Thread Style Partially Threaded, Thread Direction Right Hand, Head Height 5/32 In., Head Width 7/16 In., Temp. Range -58 Degrees to 302 Degrees F, Proof Load 120,000 psi, Screw Industry Standards ASME B18.2.1, Package Quantity 50'