The M12 40 x 40 x 3mm Heavy Duty BZP Square Plated Washers by PegDev are high-quality fasteners made from zinc material. With a square shape and a thickness of 3mm, these washers are designed for durability and long-lasting performance. The washers are zinc plated for added corrosion resistance and feature a flat head style for easy installation. Manufactured in the United Kingdom, these washers are ideal for various industrial and commercial applications where reliable fastening is required.