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 partially threaded, 8.8 grade metric screws anywhere a hex bolt may be used. Tighten with a wrench or a drill. *; ; Brand Name: Hillman Head Diameter: M12-1.75 mm Length: 25 mm Finish: Heat Treated Material: Steel Product Type: Hex Head Cap Screw Number in Package: 30 pk Grade: 8.8 Grade Thread Type: Coarse Packaging Type: Boxed Unit of Measurement: Metric