M8 D Nuts

M8 D Nuts for Furniture Legs, Feet and Threaded Fixings

M8 x 20mm D nuts provide a strong threaded anchor within suitable timber furniture frames, allowing compatible furniture legs, sofa feet, glides, castors and other M8 threaded components to be fitted securely while remaining removable when required.

Also known as furniture D nuts, screw-in insert nuts, threaded furniture inserts or furniture leg fixing nuts, they are widely used in furniture manufacture, upholstery, repair and restoration where a secure metal thread needs to be created directly within the furniture frame.

Unlike a T nut, which relies on a rear flange and gripping prongs, a D nut has a coarse external screw thread. This allows the fitting to be installed directly into a correctly prepared pilot hole from one accessible side of the timber.

M8 x 20mm Screw-In Furniture Insert

Each D nut has an internal M8 thread and an approximately 20mm long insert body.

The coarse external thread engages with the surrounding timber as the D nut is screwed into position, helping provide:

• Positive grip within the furniture frame
• Resistance to rotation
• Resistance to the insert working loose
• A strong reusable threaded connection
• Secure support for compatible M8 furniture fittings

The 20mm insert length means sufficient timber depth is required behind the fixing position.

Before drilling, check the thickness of the furniture rail or frame carefully to ensure there is enough material to accommodate the insert without drilling through a visible or finished surface.

Integral Flange Helps Control Installation Depth

The D nut incorporates a flange around the top of the insert.

This provides an important stop during installation and helps prevent the fitting being driven excessively far into the timber.

The flange can also help:

• Spread pressure around the fixing hole
• Reduce localised damage around the insert
• Protect covered furniture surfaces
• Provide a neat finished seating position
• Control the final depth of the fixing

Once the flange has reached its intended position, avoid continuing to force the fitting deeper into the timber.

Suitable for Furniture Legs and Sofa Feet

M8 D nuts are particularly useful where furniture incorporates removable threaded legs or feet.

Typical applications include:

• Sofas and settees
• Armchairs
• Upholstered chairs
• Footstools
• Ottomans
• Upholstered benches
• Bed and divan frames
• Furniture bases
• Cabinets
• Replacement furniture feet
• Furniture manufacture
• Furniture restoration
• Upholstery repairs

Browse Status Fabrics' Wooden Furniture Feet for replacement and production wooden feet or Metal Furniture Feet & Legs for metal leg options.

Always check that the chosen leg or fitting has a compatible M8 threaded connection before ordering.

Why Use a M8 D Nut?

A key advantage of a D nut is that it can usually be fitted from one accessible side of the furniture frame.

This is particularly useful in upholstered furniture where access behind the frame rail may be restricted by:

• Upholstery fabric
• Base cloth
• Padding
• Springs
• Webbing
• Other frame components

Once correctly installed, the D nut remains fixed within the timber while the furniture leg or fitting can be screwed in and removed as necessary.

This is useful when furniture components need to be removed for:

• Delivery
• Access through narrow doors
• Storage
• Transport
• Furniture repair
• Replacement of damaged feet
• Refurbishment
• Changing compatible furniture legs
• Servicing threaded castors or glides

Installing a M8 D Nut

The fitting is installed into a correctly prepared pilot hole.

The hole should be drilled square to the direction in which the finished furniture leg or fitting needs to sit.

Once the pilot hole has been prepared, start the D nut carefully and screw it progressively into the timber using a suitable hex key.

As it turns, the coarse external thread grips into the surrounding timber.

Continue until the flange reaches its intended seating position.

Avoid forcing the insert after the flange is correctly seated, as excessive tightening can damage the timber surrounding the external thread.

Once fitted, the internal M8 thread should remain clean and correctly aligned so the matching furniture component can be started easily by hand.

Check the 20mm Insert Depth Before Drilling

The approximately 20mm insert length is an important consideration when fitting this M8 D nut.

Before drilling, check:

• Timber thickness
• Required hole depth
• Position of the opposite furniture surface
• Nearby screws or staples
• Frame joints
• Webbing positions
• Springs and spring clips
• Existing furniture fixings

Mark the required depth on the drill bit or use a suitable depth stop where appropriate.

Avoid accidentally drilling through the visible side of a furniture rail or finished component.

Why the Pilot Hole Matters

A correctly prepared pilot hole is essential to achieving a sound fixing.

If the hole is too large, the external thread may not grip the timber securely enough.

If the hole is too small, excessive force may be required to install the D nut, potentially splitting or damaging the furniture frame.

The hole must also be straight.

A D nut installed at an angle can remain firmly fixed in the timber while causing the attached furniture leg, glide or castor to sit incorrectly.

Take particular care where several legs need to sit at the same angle and height.

M8 D Nuts or M8 T Nuts?

Both M8 D nuts and M8 T nuts create an internal M8 threaded connection, but they use different methods to attach themselves to the furniture frame.

a M8 D nut has a coarse external screw thread and is screwed directly into a prepared hole.

a M8 T Nut uses a threaded barrel with a broad flange and four gripping prongs.

Choose a M8 D Nut Where:

• The fitting must be installed from one side
• Access behind the frame is restricted
• A screw-in threaded insert is preferred
• The timber provides sufficient depth
• A compact fixing is required
• A rear-mounted flange would be difficult to install

Choose a M8 T Nut Where:

• The reverse of the timber is accessible
• A broad flange can sit against the frame
• Four prongs can engage securely with sound timber
• A traditional through-hole furniture fixing is required
• The existing furniture was designed around a T nut

Neither fitting is automatically stronger or better.

The correct choice depends on the frame construction, timber thickness, available access and the type of furniture component being fitted.

M8 D Nut or M8 3 Point Fixing Nut?

The M8 3 Point Fixing Nut provides another method of creating a M8 threaded furniture fixing.

Rather than relying on a coarse external thread, the three-point fixing uses a mounting plate secured with three separate screws.

A three-point fixing may be preferable where:

• A wider mounting surface is available
• The furniture construction suits a plate fixing
• Three screws can enter sound timber
• Additional resistance to rotation is required
• The original furniture used a plate-mounted fixing

a M8 D nut may be preferable where:

• A compact threaded insert is required
• Space around the fixing position is limited
• Installation must take place from one side
• A broad mounting plate would interfere with other components

M8 Wood to Metal Dowel Screws

The M8 Wood to Metal Dowel Screw provides a useful complementary fitting when manufacturing or repairing wooden furniture legs.

This 70mm fitting has a wood-screw thread at one end and a M8 machine thread at the other.

The wood-threaded section can be fitted into a suitable wooden furniture leg, leaving the M8 threaded end available to engage with the M8 D nut installed in the furniture frame.

This type of arrangement can be useful when making or repairing:

• Wooden sofa legs
• Chair feet
• Footstool legs
• Replacement furniture legs
• Custom upholstered furniture
• Furniture restoration projects

The dowel screw should be installed squarely and centrally within the furniture leg to ensure correct alignment.

M8 Screw-In Furniture Glides

M8 D nuts can also provide a threaded fixing point for compatible furniture glides.

The 25mm Black Screw-In Plastic Glide uses a M8 threaded connection and provides a compact floor-contact option for suitable sofas, ottomans, bed bases and furniture frames.

This can be useful where the furniture requires a simple fixed support rather than a decorative leg or moving castor.

Furniture glides can help:

• Protect flooring
• Reduce direct frame contact with the floor
• Improve stability
• Reduce friction
• Make furniture easier to reposition

For alternative floor-protection options, see the Furniture Glides range.

Always confirm the fixing method before ordering, as not every glide uses a M8 thread.

M8 Threaded Furniture Castors

also supplies castors with a M8 threaded fitting.

The Kenrick 50mm Shepherd Castors M8 Fitting are designed specifically for furniture using a compatible M8 threaded connection.

These provide an option for sofas, chairs, footstools and other upholstered furniture that needs to remain mobile.

Not every castor uses a threaded fixing.

Alternative furniture castors may use:

• Stem and socket fittings
• Round mounting plates
• Square mounting plates
• Grip-neck fittings
• Other proprietary fixing arrangements

Browse Furniture Castors and establish the required fitting style before ordering.

Check the M8 Thread Before Ordering

M8 refers to the nominal diameter of the metric internal thread.

The D nut must therefore be matched with a compatible M8 threaded leg, stud, glide, castor or other component.

a M8 fitting is not interchangeable with M10.

Before ordering, check:

• Existing thread diameter
• Thread pitch where applicable
• Length of the threaded stud
• Furniture-frame thickness
• Required hole depth
• Available timber around the fixing
• Existing fixing type
• Condition of the furniture frame

Do not force a fitting into the D nut simply because the thread appears approximately correct.

An incorrect thread may begin to engage before binding and damaging both components.

Furniture Feet, Castors and Glides

For the finished furniture assembly, browse Status Fabrics' complete Feet, Castors & Glides range.

The section includes:

• Wooden Furniture Feet
• Metal Furniture Feet & Legs
• Furniture Castors
• Furniture Glides

These categories provide useful complementary products for upholstery manufacture, furniture repair, restoration and replacement work.

Always match the furniture component to the correct thread and fixing method before ordering.

M8 D Nuts for Upholstery and Furniture Manufacture

M8 x 20mm D nuts provide a strong, compact and reusable method of creating a M8 threaded anchor within suitable timber furniture frames.

They are suitable for professional upholsterers, furniture manufacturers, repair workshops, restorers and experienced DIY customers working with compatible threaded furniture legs, feet, glides and castors.

Available in packs of 100 and 1000.

For alternative threaded furniture fixings, see the T Nuts, D Nuts & Fixings range.

M8 x 20mm D nuts for creating a strong, reusable threaded fixing point in suitable timber furniture frames. Use it for attaching compatible M8 threaded furniture legs, sofa feet, chair feet, glides and other removable furniture components.

The D nut has a coarse external thread that screws directly into a correctly prepared pilot hole using a suitable hex key. Once installed, the internal M8 thread provides a secure anchor for the matching furniture leg, threaded stud, glide or other compatible fitting.

The coarse external thread provides positive engagement with the surrounding timber and helps resist the insert working loose during normal furniture use. An integral flange controls the fitting depth and helps reduce the risk of splitting or damaging the covered surface around the fixing.

Particularly useful for furniture manufacture, upholstery, repair and refurbishment where the threaded fixing must be installed from one side of the furniture frame.

Suitable for use with compatible products from the Wooden Furniture Feet and Metal Furniture Feet & Legs ranges.

For low-profile furniture applications, the 25mm Black Screw-In Plastic Glides use a M8 threaded fitting. Furniture requiring movement can also be paired with a suitable M8 threaded castor such as the Kenrick 50mm Shepherd Castors M8 Fitting.

For alternative M8 fixing methods, compare the M8 T Nuts and M8 3 Point Fixing Nut, or see the T Nuts, D Nuts & Fixings range.

Available in packs of 100 and 1000.