Feature: 1. [Thread Specification] This fitting features 1/4 inch NPT x 1/4 inch NPT male thread, designed to connect two NPT female thread pipes securely and efficiently. 2. [Brass Construction] This male coupling is made of brass, with excellent erosion resistance, high temperature ductility, and low magnetic permeability, ensuring lasting performance. 3. [Leakage Proof Design] Equipped with a rubber layer, this coupler provides a leakage resistant connection, maintaining a tight sealing to prevent leakage and ensure a reliable operation. 4. [Secure Grip] The deep threading of the fitting enhances the grip and prevents slippage, ensuring a strong and stable connection between pipes for enhanced safety and performance. 5. [Versatile Application] Suitable for water, air, gas, oil, and fuel systems, this brass hex coupling can be used for a wide range of applications. Specification: Item Type: 1/4 NPT to 1/4 NPT Male Fitting Material: Brass, Rubber Specification: 1/4 Inch NPT x 1/4 Inch NPT Male Thread. Package List: 20 x 1/4 NPT to 1/4 NPT Male Fitting