5/16-24 x 2 1/4 Hex Head Cap Screws Steel Grade 5 Zinc Plating (Quantity: 700 pcs) - Fine Thread UNF Partially Threaded Length: 2 1/4 Inch Thread Size: 5/16 Inch

When selecting a nut to be used for a graded hex cap screw keep in mind that the nut should have the same grade as the bolt/screw. For instance a Grade 5 Hex Cap Screw should only utilize a Grade 5 hex nut