USS HX CP GR5 5/16X4-1/2 *Brand Name: HILLMAN *Head Diameter: 5/16 in. *Length: 4-1/2 in. *Finish: Heat Treated Zinc *Material: Steel *Product Type: Hex Head Cap Screw *Number in Package: 50 pk *Grade: 5 Grade *Thread Type: Coarse *Packaging Type: Boxed *Unit of Measurement: Metric