1/4 External Thread Pneumatic Quick Coupling Male Connector US EU Style Joint Connector Specification: New and high quality Name: Pneumatic External Thread Quick connector Material:Stainless steel Thread standard: NPT(The outer diameter is 12.75-13.2mm and the inner diameter is 11.446mm,Thread distance: 1.35mm Features: Stainless Steel material, nickel-plated surface, no rust, good sealing performance, pressure resistance, no air leakage, self-locking function, easy to use Application: suitable for air hoses, etc. Package Included1pc Note: 1. Due to manual measurement, please allow an error of 1-3mm. 2. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.