3/8 Outside Diameter x 3/8 Female Iron Pipe with 26005 Captive Sleeve NutThe 3 8 Outside Diameter x 3 8 Female Iron Pipe with 26005 Captive Sleeve Nut is a compression style fitting designed for securely connecting OD tubing to an FIP threaded connection. The inclusion of 26005 (which may refer to a cap nut, sleeve, or ferrule) ensures a leak free and secure fit, making it ideal for hydraulic, pneumatic, fuel, and water systems. Specification Details TYPE Female Iron Pipe with 26005 DESIGN Leak Proof Bulkhead Connection