The part NN-13-BK is a durable and dependable Black Nylon Locking Nut 1/2" NPT designed and manufactured by SEALCON LLC. This nut is specifically created to ensure a secure and tight connection for 1/2" NPT fittings, providing an excellent solution for various industrial applications. The locking feature of this nut ensures stability and prevents any potential loosening, enhancing the overall reliability of the connection. Crafted from high-quality black nylon material, this nut offers exceptional resistance to corrosion, chemicals, and rough environmental conditions. With its robust construction and precise threading, the NN-13-BK Black Nylon Locking Nut guarantees a long-lasting and efficient performance, making it a reliable choice for numerous plumbing and pipe fitting systems.