Hex cap screws are bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. These screws are bolts with a washer face under the head. Use these grade 5 partially threaded screws anywhere a hex bolt may be used. Tighten with a wrench or a drill. *; ; Brand Name: Hillman Head Diameter: 3/4-10 in. Length: 8 in. Finish: Heat Treated Zinc Material: Steel Product Type: Hex Head Cap Screw Number in Package: 20 pk Grade: 5 Grade Thread Type: Coarse Packaging Type: Boxed Unit of Measurement: Metric