The Arlington 410 4" Conduit Locknut is a plated steel fitting designed for securing IMC and rigid conduit in threaded installations. It features a 4-inch trade size, with a 5.32-inch diameter and 0.275-inch thickness, ensuring a strong and reliable connection. Manufactured by Arlington Industries, Inc., this locknut meets industry standards and is packaged in quantities of 25 for convenient bulk use. Its durable construction provides long-lasting performance in electrical conduit installations.