



The SPU Series Stainless Steel Push-in Fittings are designed for reliable straight tube connections in pneumatic and industrial automation systems. Manufactured from 303, 304, 316, and 316L stainless steel, they provide excellent corrosion resistance, mechanical strength, and long-term durability in demanding environments.
The series includes Straight and Straight Reducer configurations. The Straight fitting connects tubes of the same size, while the Straight Reducer accommodates different tube diameters within a single fitting. With precise machining, multiple thread standards, and OEM/ODM customization, these stainless steel push-in fittings offer a practical solution for a wide range of pneumatic piping applications.
The SPU Series Stainless Steel Push-in Fittings are designed for applications where pneumatic tubes need to be connected directly along the same axis. Their straight configuration provides a simple and compact connection path, helping maintain an organized tube layout while minimizing unnecessary bends and connection points.
Two versions are available for different system requirements. The Straight model is intended for connecting two tubes of the same diameter, making it suitable for extending or joining pneumatic lines. The Straight Reducer model connects tubes with different diameters, allowing engineers to transition between tubing sizes without using multiple components.
This straightforward design makes the SPU Series suitable for both standard pneumatic circuits and equipment with limited installation space.
SPU Series pneumatic fittings are available in 303, 304, 316, and 316L stainless steel. These material options provide excellent resistance to corrosion, moisture, and general industrial wear. Depending on the application, users can select the appropriate stainless steel grade to meet environmental and equipment requirements.
Most components are manufactured using automated production equipment, while critical processes are checked by specialized inspectors to maintain dimensional accuracy and consistent tolerances.
• 303, 304, 316, and 316L stainless steel options.
• Straight and Straight Reducer configurations.
• BSP, PT, NPT, and metric thread options.
• OEM and ODM customization supported.
• CAD drawings available according to customer requirements.
• Ultrasonic inspection, cleaning, and drying before shipment.
• ISO9001, CE, and FDA certifications.
The push-in structure allows pneumatic tubing to be connected quickly without complicated installation procedures. After preparing the tube end, the tube can be inserted directly into the fitting to create a secure connection. This design helps reduce assembly time and simplifies routine maintenance.
The Straight version is suitable for equal-size tube connections, while the Straight Reducer provides a convenient transition between different tube diameters. This makes it easier to adapt pneumatic circuits when equipment contains components with different tubing specifications.
SPU Series Stainless Steel Push-in Fittings are widely used in industrial automation, pneumatic machinery, packaging equipment, robotics, assembly systems, instrumentation, and food processing equipment. Their compact straight structure is particularly useful where tubing needs to follow a direct route through confined equipment spaces.
The Straight model supports basic tube extension and connection, while the Straight Reducer adds flexibility for mixed-size pneumatic circuits. Combined with corrosion-resistant stainless steel construction and multiple thread options, the SPU Series provides a dependable connection solution for efficient and adaptable pneumatic piping systems.




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