The HEYCO PRODUCTS part 8465 is NLN 3/4 NPT Heyco® Nylon Locknuts with NPT Thread. These locknuts are made from durable nylon material and feature a NPT (National Pipe Thread) thread design. They are designed to securely lock and fasten pipes, fittings, and other threaded components together, providing a reliable and leak-resistant connection. The 3/4 NPT size makes them suitable for a wide range of applications. Trust Heyco® brand for top-quality products that ensure superior performance and durability.