304 STAINLESS STEEL MATERIAL-- High quality 304 stainless steel, rust and corrosion resistant With the addition of an integrated flange at the base of the head, this kind of screw eliminates the need for a flat washer 5 optional common lengths for general purpose use and projects Used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry Length: 16mm, 20mm, 25mm, 30mm, 35mm, Manufacturer: Walfront