The Hobsons X9 Class 3 Countersunk Phillips Screw (#8-18 x 25mm) is a premium self-drilling fastener designed for secure metal-to-metal fixing where a flush finish is required. Featuring a countersunk Phillips head and Class 3 corrosion-resistant coating, it provides a clean, professional appearance while delivering reliable performance in general indoor and protected outdoor applications. The #8-18 thread and self-drilling point enable fast installation into light gauge steel without the need for pre-drilling in most applications. Supplied in a convenient 1000-piece box, it is ideal for sheet metal fabrication, electrical work and general construction projects.