Discover the durable Bert Transmissions Washer, part number BER309, specifically designed for Bert Idler Gears. Crafted from high-quality steel with a protective zinc oxide finish, this flat washer features an inner diameter of 0.635 inches and an outer diameter of 1.104 inches, making it ideal for various fastening applications. Its compact dimensions (5.3 x 2.95 x 0.45 inches) ensure a perfect fit in confined spaces while maintaining structural integrity.