This 5/16" (1/2-20 I) Brass Tube Nut helps prevent compounds from escaping, and is dependable for any hydraulic line job. Our brass tube nuts are made of durable brass for long-lasting performance and strength. Threadd sizes include 1/2-20 I which makes them compatible with SAE standards and other configurations. These hardened steel nuts provide secure yet adjustable compression between the flared end of a tube and its opposing fitting, providing an easy to use solution that takes up minimal space in tight spaces. Features: - Durable brass construction - Thread size of 1/2-20 I - Embedded hardened steel nut Benefits: - Secures yet adjustable compression between flared end of the tube and its opposing fitting. - Easy installation in tight spaces - Compatible with SAE standards