Description 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 high 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 tubes, these air line fittings are suitable for use in pneumatic systems, hydraulic systems, pipeline systems, automotive manufacturing, and industrial automation applications.