• Made of high hardness brass with resistance to corrosion, rust, and wear. • Knurled head design with shoulder that provides a solid grip for tightening or loosening by hand without tools. • M4 threading diameter with 0,7 mm pitch and 20 mm shank length. • Full threading style with smooth surface for effective fastening function. • Suitable for use in household appliances, automotive industry, musical instruments, and electronic equipment. • Head dimensions: 9,5 mm diameter and 8 mm thickness.