Permaswage® D10036 Union Fittings: Complete Technical Guide & Part Number Reference
Permaswage® D10036 Union Fittings are standard permanent Permaswage tube fittings used in the Permaswage® 3,000 PSI Tube Connecting System. These fittings are designed to create permanent, leak-resistant straight tube-to-tube connections in aerospace hydraulic, fuel, pneumatic, lubrication, and fluid conveyance systems.
The D10036 series covers standard union fittings from 3/16" through 1" tubing. For larger tube sizes, the D10136 series continues the same union fitting family for 1-1/4" and 1-1/2" tubing.
In this guide, we’ll explain what Permaswage® D10036 Union Fittings are, how they are used, and provide a complete part number and dimensional reference for the D10036 and D10136 union fitting series.
What Is a Permaswage® D10036 Union Fitting?
A Permaswage® D10036 Union Fitting is a straight fitting used to permanently connect two sections of tubing with the same outside diameter.
During installation, the fitting is hydraulically swaged onto the tube. This creates a permanent mechanical connection without welding, brazing, soldering, or tube flaring.
Union fittings are among the most commonly used Permaswage® fitting styles because they provide a simple, straight-through connection while maintaining system reliability in demanding aerospace environments.
Why Use Permaswage® Union Fittings?
Permaswage® union fittings are used where a permanent straight tube connection is required. Their design supports reliable performance in high-pressure and high-vibration environments.
- Permanent tube-to-tube connection
- No tube flaring required
- Designed for 3,000 PSI applications
- Suitable for aerospace hydraulic and fluid systems
- Excellent vibration resistance
- Reliable long-term performance
- Available in multiple tube sizes
Permaswage® D10036 and D10136 Union Fitting Part Numbers
The following table lists the standard Permaswage® union fitting part numbers by tube size.
| Tube Size | Dash Size | Union Fitting Part Number | Series |
|---|---|---|---|
| 3/16" | -03 | D10036-03 | D10036 |
| 1/4" | -04 | D10036-04 | D10036 |
| 5/16" | -05 | D10036-05 | D10036 |
| 3/8" | -06 | D10036-06 | D10036 |
| 1/2" | -08 | D10036-08 | D10036 |
| 5/8" | -10 | D10036-10 | D10036 |
| 3/4" | -12 | D10036-12 | D10036 |
| 1" | -16 | D10036-16 | D10036 |
| 1-1/4" | -20 | D10136-20 | D10136 |
| 1-1/2" | D10136-24 | D10136 |
Permaswage® Union Fitting Dimensions
The table below provides dimensional reference data for the Permaswage® D10036 and D10136 union fitting series.
| Part Number | Tube Size | A | B O.D. | C I.D. |
|---|---|---|---|---|
| D10036-03 | 3/16" | 1.255 | .275 | .198 |
| D10036-04 | 1/4" | 1.540 | .338 | .260 |
| D10036-05 | 5/16" | 1.620 | .413 | .322 |
| D10036-06 | 3/8" | 1.690 | .480 | .385 |
| D10036-08 | 1/2" | 2.700 | .655 | .511 |
| D10036-10 | 5/8" | 2.780 | .787 | .636 |
| D10036-12 | 3/4" | 2.920 | .929 | .761 |
| D10036-16 | 1" | 3.209 | 1.257 | 1.011 |
| D10136-20 | 1-1/4" | 3.414 | 1.489 | 1.262 |
| D10136-24 | 1-1/2" | 3.664 | 1.786 | 1.517 |
Approximate Weight by Material
The following table provides approximate fitting weight by material.
| Part Number | CRES Weight | Aluminum Weight | Titanium Weight |
|---|---|---|---|
| D10036-03 | .010 | .004 | .005 |
| D10036-04 | .013 | .005 | .007 |
| D10036-05 | .019 | .007 | .010 |
| D10036-06 | .028 | .010 | .015 |
| D10036-08 | .073 | .025 | .042 |
| D10036-10 | .095 | .032 | .054 |
| D10036-12 | .127 | .043 | .072 |
| D10036-16 | .203 | .069 | .115 |
| D10136-20 | .209 | .071 | .119 |
| D10136-24 | .216 | .073 | .123 |
Common Applications
Permaswage® union fittings are used where two straight sections of tubing need to be permanently connected.
- Aircraft hydraulic systems
- Fuel systems
- Pneumatic systems
- Lubrication systems
- Environmental control systems
- Landing gear hydraulic circuits
- Flight control systems
- Military aircraft maintenance
- Aerospace manufacturing
- MRO repair operations
How the D10036 Union Fitting Works
The D10036 union fitting is installed by positioning the fitting over properly prepared tubing and using approved swaging equipment to compress the fitting onto the tube. The result is a permanent connection that becomes part of the tube assembly.
This process eliminates the need for threaded connections or flared tube ends and helps reduce the risk of leakage caused by vibration, fatigue, or improper torque.
Related Permaswage® Fitting Families
The D10036 and D10136 union fittings are part of the larger Permaswage® 3,000 PSI fitting family.
- D10045 Union Reducers
- D9856 and D10256 90° Elbow Fittings
- D10559 and D10155 Tee Fittings
- D10564 and D10254 Cross Fittings
- D10164 Bulkhead Union Fittings
Frequently Asked Questions
What is a Permaswage® D10036 fitting?
The D10036 fitting is a straight union fitting used to permanently connect two sections of tubing with the same outside diameter.
What sizes are available in the D10036 series?
The D10036 series covers 3/16" through 1" tubing, including dash sizes -03, -04, -05, -06, -08, -10, -12, and -16.
What part numbers are used for larger union fittings?
For larger sizes, the D10136 series is used for 1-1/4" and 1-1/2" tubing.
Can Permaswage® union fittings be reused?
No. Permaswage® union fittings are permanent fittings and are not designed to be reused after installation.
What pressure system are these fittings designed for?
The D10036 and D10136 series are part of the Permaswage® 3,000 PSI Tube Connecting System.
Where are D10036 union fittings commonly used?
They are commonly used in aerospace hydraulic, fuel, pneumatic, lubrication, and fluid conveyance systems.
Why Buy Permaswage® Union Fittings from Top Flight Tools?
At Top Flight Tools, we specialize in sourcing new, surplus, and hard-to-find Permaswage® fittings and tooling for aerospace and industrial applications.
Whether you need a single D10036 union fitting, a larger D10136 union fitting, or related Permaswage® DLT fittings, our team can help identify the correct part number for your application.
Conclusion
Permaswage® D10036 Union Fittings are among the most common straight fittings used in the 3,000 PSI Tube Connecting System. Their simple design, permanent installation method, and reliable performance make them a critical component in aerospace fluid systems.
For larger tube sizes, the D10136 series continues the union fitting family, providing the same straight tube-to-tube connection function for 1-1/4" and 1-1/2" tubing.
⚠️ Disclaimer
Top Flight Tools (TFT) is an independent reseller and is not affiliated with, sponsored by, or endorsed by Permaswage® or Precision Castparts Corp. (PCC). All product names, trademarks, and registered trademarks are the property of their respective owners. Any reference to Permaswage® products, specifications, or part numbers is provided for informational purposes only. All Permaswage® trademarks and part numbers remain the property of their respective companies.
While every effort is made to ensure the accuracy of the information provided, it is the customer’s responsibility to verify all specifications, compatibility, and suitability of products for their intended application prior to use. TFT assumes no liability for errors, omissions, or the misuse or misapplication of this information, and disclaims any responsibility for damages resulting from reliance on it.