Product details:

Hex Head Cap Screw, System of Measurement Inch, Basic Material Steel, Material Grade Grade 8, Fastener Finish Plain, Dia. /Thread Size 1/4 In.-28, Fastener Length 2 1/4 in, Fastener Thread Direction Right Hand, Fastener Thread Type UNF (Fine), Fastener Thread Style Partially Threaded, Fastener Industry Standards ASME B18.2.1, Head Type Hex, Min.