Hex Head Cap Screw Head Type Hex Diameter 1/4 In. Grade 5 Material Carbon Steel Finish Zinc Plated Thread Size 1/4-28 Thread Type Fine Length under Head 3-1/4 In. Thread Length 3/4 In. Head Height 5/32 In. Thread Style Partially Threaded Thread Direction Right Hand Tensile Strength 105 000 to 120 000 psi Rockwell Hardness C19 to C30 Meets/Exceeds ASME B18.2.1 Package Quantity 50