Choosing The Right Insert Nut For The Job

Insert Nuts for Furniture Legs

Insert Nuts are a proven solution for providing a machine thread in wood and other materials. JET PRESS provides a wide selection of Insert Nuts manufactured from zinc alloy, brass and nylon. The different designs have features that provide benefits to suit a wide variety of needs. They are used a lot by furniture makers to attach castors and head boards. They are also used in office furniture and shop fitting. When combined with a Furniture Connector Bolt they create a visually attractive appearance.


Choose the Right Insert Nut


Find the best insert nut to match your requirements

An Insert Nut provides a fixed thread for use in timber – it couldn’t be simpler, right? Well, there’s a little bit more to think about when selecting the correct Insert Nut for your job. The thread size and length of insert required are often determined by the fixings being used and the timber thickness. Further options are available to match your requirements.

Consider the forces in play in the joint where the Insert Nut is to be used. If it’s a fairly lightweight application, an A Type or B Type Knock-in insert will probably be suitable. The main advantage of using these is the simplicity and speed of insertion. They tap into a pre-drilled hole to fix the Insert Nut into the timber. The external barbs will prevent spinning and offer a good level of pull out force so they work well with hard wood and plywood.

The A Type Inserts are unheaded allowing the entirety of the fitting to be embedded in the timber for a flush fit. The B Type has a flanged head which can prevent pull-through when bolted from the underside.


Screw in and specialist Insert Nuts

Screw-in Type D and Type E Insert Nuts offer a greater degree of hold-in and a higher resistance to vibration, thanks to the external, self-tapping thread. The hex head makes fitting quick, accurate and easy using a hexagon driver or Allen key. This makes them well suited for use in soft woods and chipboard. The flange on the D Type ensures that the insert is screwed tightly up to the timber surface. The Type E can be fully embedded within the pre-drilled hole.

We also stock a variety of specialist parts which may be more suitable for your application. End capped Type I inserts offer a neat finish where the head is visible. Large flanged inserts spread load across a larger surface area on heavy duty assemblies.

Expanding brass Type X inserts will grip tighter into a pre-drilled hole as the fixing bolt is screwed in, thanks to a small plastic ball inside the thread that forces the sides of the nut apart. Serrated Type P Insert Nuts ensure a high pull-out resistance is achieved with minimal insertion torque. These Insert Nuts are self-tapping and give a strong, permanent metal thread in wood and other similar sheet materials. 

So, a few minutes spent choosing the right part can make all the difference to your finished product. If you’d like help choosing the right insert nut, please contact us and we’ll be happy to offer some advice or samples for you to try out.

If you have any questions please call +44 1623 788 400 or use our online form.


Insert Nut Application


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