Accessories, Accessories, Upholstery Supplies
T-Nut 5/16″ Thread x 17.5mm Long
$1.00
In stock
5/16" thread x 17.5mm long zinc plated metal T-Nut designed to provide a deeper and more secure threaded fixing in timber furniture. Commonly used for attaching sofa legs, chair feet, castors and structural components, this longer insert offers increased grip within thicker timber sections. Featuring a 4 prong design that locks firmly into the wood, making it ideal for both repairs and new installations. 5/16" Thread T-Nut Insert – 17.5mm Long Barrel. Suitable for standard 5/16" bolts used in furniture and timber applications. Designed for deeper timber mounting points where a longer insert is required for added strength. Need a Shorter or Larger Thread Size? We also stock 5/16" shorter versions and 3/8" thread T-Nuts. Browse our full range of T-Nuts and furniture fasteners (click here) or contact us if you need help selecting the correct size. read more
In stock
- Description
- Technical Specifications
- How To
- Reviews (0)
- FAQs
- Add a review
Description
5/16" Thread T-Nut Insert – 17.5mm Length for Deeper Timber Fixings
This 5/16″ thread x 17.5mm long metal T-Nut is designed for applications requiring a deeper and more secure threaded anchor in timber. The extended barrel length allows for increased contact within the wood, providing improved holding strength compared to shorter inserts.
Zinc plated for corrosion resistance, this T-Nut delivers a durable internal thread for repeated bolt use without damaging the timber. The 4 prong design helps secure the insert firmly in place, reducing the risk of rotation or pull-out.
Ideal for Furniture, Upholstery and Structural Timber Applications
This longer T-Nut is commonly used where additional holding strength is required, such as securing sofa legs, recliner components, castors, and structural fittings in thicker timber frames.
It is also suitable for cabinetry, joinery, workshop builds, and general timber construction where a deeper threaded insert is beneficial. A great option when replacing damaged or pulled-out fittings that require a stronger solution.
Installation Guide and Size Selection
This T-Nut suits 5/16″ thread bolts and features a 17.5mm long barrel. Installation requires a hole approximately 10–12mm in diameter and sufficient timber depth to accommodate the longer insert.
The prongs are designed to bite into the timber when tapped into place, helping to lock the insert securely. Installation is typically carried out from the rear side of the timber panel for best results.
We also stock shorter 5/16″ versions and 3/8″ thread options. If your timber is thinner or your bolt size differs, consider these alternatives or contact us for guidance.
Reliable Fastening Solutions from Sofa Rehab
At Sofa Rehab, we supply quality replacement parts and hardware designed to make repairs easier and more cost-effective. Whether you’re fixing a loose sofa leg, replacing a worn fitting, or working on a custom project, our range of furniture fasteners and components are selected for reliability and ease of use.
If you’re unsure about compatibility or sizing, our team is here to help. We can assist you in identifying the correct part so you can complete your repair with confidence.
DIY Friendly – Replace It Yourself and Save
Installing a T-Nut is a simple process that can be completed with basic tools. With just a drill and a hammer or mallet, you can create a strong threaded fixing point in minutes. No specialised skills are required, making this an ideal solution for DIY furniture repairs and general timber projects.
Fix loose legs, secure fittings, or reinforce worn mounting points yourself and avoid the cost of professional repairs. With our step-by-step guides and support available, you’ll have everything you need to get the job done and enjoy the satisfaction of doing it yourself.
Technical Specifications
Technical Specifications
| Product Type | T-Nut / Tee Nut |
|---|---|
| Thread Size | 5/16″ |
| Barrel Length | 17.5mm |
| Finish | Zinc Plated |
| Colour | Silver |
| Material | Metal |
| Prongs | 4 Prong Design |
| Recommended Hole Size | 10–12mm |
| Minimum Timber Depth | 18mm (recommended) |
| Installation Type | Press / tap into timber from rear side |
| Typical Uses | Sofa legs, castors, connectors, structural components, cabinetry and timber fixings |
| Suitable Bolt Thread | 5/16″ thread bolt |
How To
How To
How To Install a T-Nut in Furniture Timber
This longer T-Nut is ideal for creating a deeper and stronger threaded fixing point in timber furniture. It is commonly used for securing legs, castors, and structural components.
Before starting, take a photo of the original setup for reference. When handling larger furniture, always use safe lifting techniques and get assistance where required.
Tools Required
- 5/16″ x 17.5mm T-Nut
- Drill with 10–12mm drill bit
- Hammer or rubber mallet
- Matching 5/16″ bolt or fitting
Step 1: Prepare the Furniture
Safely position the furniture to access the timber frame. Remove old hardware and clean the mounting area.
Step 2: Drill or Check Hole
Ensure the hole is between 10mm and 12mm in diameter and deep enough to accommodate the longer barrel.
Step 3: Insert the T-Nut
Place the T-Nut into the hole from the rear side with the prongs sitting flush against the timber.
Step 4: Tap into Position
Gently tap the T-Nut so the prongs embed securely into the wood.
Step 5: Tighten and Secure
Insert the bolt or furniture leg and tighten to fully seat the T-Nut into the timber.
Reviews (0)
Thank you for making an effort to leave a reivew but to protect against spam we only accept reviews from verified owners. Please proceed to login using the same email address you used when ordering the product.
Customer Login
- There are no reviews yet.
FAQs
FAQs
When should I use the 17.5mm version instead of 10mm?
Use this longer version when working with thicker timber or when extra holding strength is required.
Is this stronger than shorter T-Nuts?
Yes, the longer barrel provides more contact with the timber, improving overall grip.
What size bolt does this fit?
It suits standard 5/16" thread bolts.
Can this be used for sofa legs?
Yes, especially where the timber base is thicker or needs stronger anchoring.
Will it stay secure once installed?
Yes, the prongs grip into the timber to help prevent spinning or loosening.
