Socket Head Cap Screw, System of Measurement Inch, Cylindrical, Basic Material Steel, Material Grade Alloy Steel, 1/4 In. -28, Length 1 1/2 in, Fastener Finish Black Oxide, Fastener Thread Type UNF (Fine), Drive Type Hex Socket, Drive Size 3/16 in, Thread Style Partially Threaded, Thread Direction Right Hand, Min. Thread Length 1 in, Thread Length 1 in, Head Height 0.25 in, Thread Dia. 1/4 in, Package Quantity 100