Union Nut ·
Custom BSPP Union Nut Configurator – for Hydraulics & Pneumatics
Configure a custom union nut online - BSPP / G thread size, bore diameter, and overall length freely adjustable. For hydraulic lines, pneumatic fittings, and pipe connections, no CAD needed.
🔍 Configure a custom BSPP union nut online
Need a union nut with a BSPP (G) thread in a size, bore, or length combination you simply can't find off the shelf? With our online configurator you build a custom union nut for hydraulic, pneumatic, and technical pipe connections in a few clicks - no CAD skills required.
- Choose the thread size (BSPP / G).
- Enter the bore diameter for the pipe or hose.
- Set the overall length of the nut.
- Get an instant price and order directly.
Why a custom union nut instead of a stock part?
Off-the-shelf BSPP union nuts are usually only available in a handful of fixed combinations of thread size, bore, and overall length. When you need to replace a damaged or lost nut on an existing hydraulic hose, need a non-standard length for a machine build, or simply can't get the right size right now, a parametric configurator solves the problem: you enter the thread size, bore diameter, and length yourself, and the rest of the geometry is derived automatically.
Union nut as a replacement part for hydraulics and pneumatics
One of the most practical use cases is replacing a damaged or missing union nut on an existing hydraulic line or pneumatic fitting. Instead of waiting for a complete fitting kit, you configure just the nut with the BSPP thread you need, matched to your application.
Common BSPP thread sizes
The configurator covers the thread sizes commonly used in pneumatics and hydraulics: G1/8 and G1/4 for compact air lines and small connectors, G3/8 for technical pipe connections in machine building, G1/2 for hydraulic and water-technology applications, G3/4 for larger pipe joints in plant engineering, and G1 for industrial and heavy-duty setups with larger fittings.
Plastic union nut for custom pipe adapters
A configurable plastic union nut with BSPP thread is also a fast solution as a connector for custom pipe adapters or as a part in a self-built test rig - the outer shape follows familiar union nut ergonomics so it grips well by hand.
Your benefits
- ✅ Configure a union nut with BSPP / G thread to your exact fit
- ✅ Just 3 inputs: thread size, bore diameter, overall length
- ✅ Remaining geometry derived automatically
- ✅ Familiar union-nut outer shape, not a plain hex nut
- ✅ Instant price calculation
- ✅ Download as STL or order directly with 3D printing
Matching piping system parts from the configurator
Alongside the union nut, our hydraulics category offers other parametric components: pipe bends, pipes, closed 3-way pipe connectors, hollow threaded spindles, double-thread adapters, and threaded plugs - all individually configurable and orderable as 3D-printed parts.
What material should I use for a union nut?
PLA is useful for visual checks and quick samples, PETG holds up better for tougher workshop parts, and ASA is suited for outdoor use or higher temperature exposure. For threads and fits, verify clearance, wall thickness, and print orientation before ordering.
FAQ
Can I order a union nut with a custom thread size?
Yes. In the configurator you choose the BSPP / G thread size, bore diameter, and overall length yourself.
What type of thread does the configurator generate?
A BSPP (G) internal thread, commonly used for pipe fittings in hydraulics and pneumatics.
Is the STL generated from my input values?
Yes. The STL is generated from the parameters you enter and made available for download or ordering once configured.
Can I download the union nut as an STL or order it printed directly?
Yes. Once configured, you can use the model for STL download or order the 3D print directly.
Do I need to check dimensions and tolerances before ordering?
Yes, please check dimensions before ordering. Fit, strength, and tolerances depend on material and print settings.
Configure your custom union nut now
Choose the thread size, bore diameter, and overall length, and order your custom union nut directly with 3D printing.
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