Thread Size: M8-1.25mm; Thread Pitch: 1.25mm; Screw Length: 12mm (meaured from under the head) Package: 12 PCS; Exterior Finish: Black Oxide; Grade: 10.9 Class Height of the head: 4.4mm; Diameter of the head: 14mm; Torx Drive Size: T40 Material: Alloy Steel. Made of high quality 10.9 grade alloy steel with black oxide finish which provide perfect strength and good corrosion resistance. Commonly used on automobiles, motocycles, bicycle brake systems, hard disk drives, computer systems, consumer electronics and construction industries. Button head style make it ideal use in confined areas and offer clear looking.