Thomas Dudley Nylon Back Nut - 3/4 Inch - White
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Product Information
Full details
The Thomas Dudley Nylon Back Nut is designed for both professional plumbers and DIY enthusiasts who need a reliable, durable component for securing plumbing fixtures. It provides a secure, leak-resistant fit for 3/4-inch BSP connections, offering excellent strength in a lightweight form factor. Users should note that while it is labeled as 3/4-inch, the physical diameter of a BSP thread measures 1 inch, so accurate measurement before purchase is essential to ensure compatibility.
All features
| Colour | White |
|---|---|
| Model Part Number | 82075581 |
| Brand | Thomas Dudley |
Extended Product Information
FAQs
What size spanner do I need for this nut?
You need a 31mm spanner.
Does the 3/4-inch size mean the thread is 3/4-inch wide?
No. In accordance with BSP standards, a 3/4-inch thread measures 1 inch in diameter.
Is this nut suitable for outdoor use?
Yes, the nylon material is resistant to corrosion, making it suitable for damp or outdoor plumbing areas.
Can I use this on metal pipes?
Yes, as long as the pipe has a standard 3/4-inch BSP male thread.
What is the outside diameter of the nut?
The outside diameter of the nut is 42.5mm.
Does this come with a sealing washer?
The nut is provided as a standalone component; always ensure you use an appropriate washer to create a watertight seal.
Troubleshooting
Nut feels loose after installation
Ensure the washer is seated correctly between the nut and the basin/cistern surface before re-tightening.
Difficult to screw on by hand
Check threads for debris or paint; clean the male thread thoroughly before attempting to screw on the nut again.
Pros and Cons
Pros
- Lightweight yet highly durable nylon material
- Resists corrosion and rust common in plumbing environments
- Standard BSP threading ensures broad compatibility
- Easy to tighten using a standard 31mm spanner
Cons
- Requires specific 31mm tool for proper torque
- Can be prone to cross-threading if not aligned correctly
- Not suitable for high-pressure industrial pipework
Setup, Compatibility & Care
To install, ensure the threads on your fixture are clean and free of debris. Always verify that your pipe thread is standard 3/4-inch BSP, which will measure 1 inch in outside diameter. Thread the nut by hand first to prevent cross-threading, then use a 31mm spanner to finish the job. Avoid using heavy-duty pipe wrenches that may grip and damage the nylon surface. To maintain the component, periodically check for signs of loosening due to thermal expansion or contraction and ensure no chemical cleaners are applied that might degrade the nylon material.