GN 842-550-AS is a cam action clamping knob from Elesa & Ganter. The knob has a smooth surface, indexed black thermoplastic head, and is made of zinc die cast with a chrome plated finish. The clamping profile is knurled for an ergonomic grip, and it has an integrated steel clamping plate intended for use with clamps with M6 threaded holes. The knob is designed for use in applications where a quick and secure manual clamping of components is necessary and the clamping position needs to remain consistent, such as with machine tools, operational levers, and control devices.