Usage Tips: 1. Size specification: 12 mm tube OD x 1/2 inch NPT thread; model: PCF12N04; type: female straight; operating pressure: 01 MPa / 0145 psi; proof pressure: 1.6 MPa / 232 psi; working temperature: -40 C to 60 C / -40 F to 140 F. 2. Material: Made of PBT plastic and nickel-plated brass, the quick connect fitting is durable, corrosion-resistant, and pressure-resistant, offering reliable sealing performance and tensile strength for long-term use. The pneumatic tube fitting can withstand higher pressure without disengaging, ensuring a secure connection with the air pipe and preventing accidental detachment. 3. Feature: One end features a female thread, while the other end is a push-to-connect tube connector, enabling quick and tool-free installation or removal of the air pipe. The release collar rotates 360 degrees after installation for easy pipe direction adjustment. A stainless steel retaining ring is integrated for enhanced durability and secure fixation of the air pipe. 4. Application: Designed for connecting PU, PA, PE, and PVC tubing, these air line fittings are suitable for use in pneumatic systems, pipeline systems, industrial automation, automotive manufacturing, and other pressure and temperature-rated applications.