Boker's portfolio include non-standard square and rectangular washers that can be custom made with a variety of materials and sizes to suit multiple application requirements. These non-standard square and rectangle flat washers cover a range up to 12" x 12" with thicknesses from .005" to .135". The square and rectangular washers complement diverse fastening applications. With their flat sides, square and rectangular washers are designed to prevent rotation and fit in restricted spaces that do not accommodate round washers. They are commonly used in construction, machinery, and automotive applications. The supplier manufactures square and rectangular washers to customer specifications, offering options in more than 2,000 commonly specified and difficult-to-find materials, including metallic and non-metallic materials. Metallic material selections include low-carbon sheet steel, various spring steels, stainless steel, aluminum, brass, copper and nickel silver. Non-metallic material options include ABS, acetal, polyester, nylon, nylon MD, polycarbonate, fiber, polyethylene and various NEMA grade laminates.