Stainless Steel DIN 6923 Flange Nut Yokelink’s Stainless Steel Flange Nuts are manufactured in both A2 and A4 Stainless Steel, in either a natural or Matte Black finish. Often simply referred to as a Washer nut or a Flange Nut, Flanged Hexagon Nuts are used in place of a regular Hexagon Nut and a Flat Washer. The flange of this nut is essentially an integrated washer, which helps with load distribution and can negate the need for using a separate washer. This makes Washer Nuts ideal for applications where space is limited. Serrated Flange Nuts are also available from Accu, which feature a flange with a serrated underside, designed to bite into the mating surface to provide additional grip and resistance to vibrations. Yokelink stainless steel serrated flange locknut is widely used for installing heavy components on the rails, such as ventilation systems, Cable ducts, pipes, also as Solar Accessories on solar panels on the roof,Solar panel mounting Hardware, Spring Channel Nut, Solar Mounting Fasteners, solar mounting components, PV Pannel Installation, Solar Mounting Fasteners,solar panel mounting hardware etc., allowing components to slide on the rails, and adjustment work can also be performed on the rails.