Specifications
| Parameter | Details |
|---|---|
| Product Type | Pneumatic Fittings |
| Series | C Type Quick Fitting Series |
| Structure | Straight Union |
| Connection | Tube to Tube |
| Installation | Push-to-Connect |
| Material | Nickel-Plated Brass / Stainless Steel |
| Operating Fluid | Air |
| Working Pressure | 0 – 1.0 MPa |
| Temperature Range | 0 – 60°C |
| Applicable Tubing | PU / Nylon Tube |
Straight union fittings provide simple and efficient tube extension and connection in pneumatic systems.

Model: Model: (Example PUT4)
| 4 |
| 6 |
| 8 |
| 10 |
| 12 |
| 14 |
| 16 |
Key Features
- Straight union tube-to-tube connection
- Smooth airflow without direction change
- Push-to-connect quick installation
- Compact and lightweight structure
- Reliable sealing performance
- Suitable for simple pneumatic layouts
Applications
Pneumatic control systems
Used for extending or connecting air tubes in a straight line
Industrial automation equipment
Ensures stable tube connections in automated systems
Air distribution systems
Supports clean and organized pipeline layouts
Machinery equipment
Suitable for basic pneumatic tube connections
PU and nylon tubing systems
Compatible with common pneumatic tube materials
Product Function
PUT fittings are used to connect two pneumatic tubes in a straight line, enabling continuous airflow without changing direction.
They are essential components in pneumatic systems for extending tubing length, repairing pipelines, and simplifying system layouts.
Compared to elbow or tee fittings, PUT provides the most direct airflow path, reducing resistance and improving efficiency.
Product Structure & Size Range
- Models: PUT4 / PUT6 / PUT8 / PUT10 / PUT12 / PUT16
- Tube sizes: 4mm → 16mm
- Straight union structure
- Push-to-connect tube interface
- Compact inline connection design
Why Choose Our Pneumatic Fittings
- Professional PUT pneumatic fitting manufacturer
- OEM / ODM customization for straight union fittings
- Reliable push to connect straight connector solution
- Compact design for efficient pneumatic layouts
- Stable performance for industrial applications
- Fast delivery and global B2B supply support
FAQ
Q1: What is a PUT pneumatic fitting?
It is a straight union push-to-connect fitting used for connecting two pneumatic tubes directly.
Q2: What is a straight union fitting used for?
It is used to extend tubing or connect two tubes in a straight pneumatic line.
Q3: What is the advantage of PUT fittings?
They provide direct airflow with minimal resistance and simple installation.
Q4: What tubing is compatible with PUT fittings?
PUT fittings are suitable for PU tubing and nylon tubing.
Q5: Can PUT fittings be customized?
Yes, OEM/ODM customization is available for tube size, material, and branding.
CTA
Looking for reliable PUT straight union push-to-connect pneumatic fittings?
Contact us today for OEM/ODM solutions, bulk pricing, and fast delivery.


