Nut Caps

Yes, for both Secure and Domed Nut Caps we have the ability to offer RAL colours to meet requirements. In most cases however a minimum order will apply, due to the manufacturing process involved with these products.

Across the flats is a measurement used to match up nut sizes, being the measurement from one flat side, to the other. This measurement should be paired with the metric thread size of the nut/bolt to ensure a perfect fitment.

These work like the name suggests, by 'securing' the nut. This product comes in two parts (the base and the cap), with the base acting as an enclosing washer before the locking cap is pushed inside. Once the locking cap has been installed, access can no longer be gained to the nut head.

Cap nuts, also known as nut caps, are designed to cover and protect exposed bolt or screw threads. Their main uses include:

• Preventing injury from sharp or protruding threads

• Protecting fasteners from corrosion, dust, and moisture

• Creating a neat, finished appearance for bolts and nuts on visible assemblies

• Improving safety in public, industrial, or commercial environments

Yes, our nut caps are made from durable materials such as LDPE Plastic, making them suitable for repeated use. Their push-fit design ensures:

• Easy installation and removal by hand

• Reusability across different projects or maintenance cycles

• Consistent protection and appearance over time

• Cap nuts generally refer to any nut or cover designed to enclose the end of a bolt or screw, providing protection and a finished look.

• Dome nuts specifically have a rounded, dome-shaped top, offering a decorative finish and additional safety by fully covering exposed threads.

• Both types serve similar protective purposes, but dome nuts are often chosen where appearance and enhanced safety are priorities.

Thread protection nut caps are designed to cover and shield the entire threads of bolts, screws, and nuts from:

• Damage during handling, transport, or storage

• Contamination from dirt, moisture, and debris

• Corrosion or weathering, particularly in outdoor environments

These caps help maintain the integrity of threaded fasteners and reduce maintenance needs.

Secure nut caps are specially designed to provide a tight, tamper-resistant fit over nuts and bolts. Features include:

• Extra grip or locking design to prevent accidental removal

• Added protection against vandalism or tampering in public installations

• Reliable coverage for fasteners in safety-critical or high-traffic areas

Nut caps are used in a variety of industries and environments, including:

• Playground and public park equipment for safety and appearance

• Automotive and machinery assembly for thread protection

• Furniture and shopfitting for a neat finish

• Construction, railings, and fencing to prevent injuries and corrosion

If you need assistance selecting the right nut cap or would like to discuss custom options, contact our expert team at 01233 713581.

Need your parts tomorrow? Our rapid same day dispatch has got you covered! Simply place your order before 4pm Mon-Thurs or 2pm Friday and select our Next Day Delivery service in the shopping cart. We also offer Guaranteed AM delivery when required, in addition to a Saturday delivery option.

If you don't mind waiting, we have a Free delivery method for orders over £30, and an economic £4.85 2nd Class delivery for orders between £10-£30.

Free Samples can be requested through our product pages, displayed in the sizing table beside the product you require. Please note you can always give us a call on 01233 713 581 or contact us on Live Chat to discuss samples.

You do not need to sign up to place an order, but it is recommended if you'd like to gain loyalty points, giving discount off future orders. To learn more about loyalty points, please view our rewards scheme page.

If you're unsure which part you need then please do not hesitate to give one of our friendly Sales Team a call on 01233 713 581 and they can assist you. Alternatively, we're active on Live Chat during office hours. You can open this using the button in the bottom right corner of the website. Alternatively, you can write to us using our contact form.

We offer a return period on all of our products to give you peace of mind, to view our policies and learn more about this process should it be required, please see our returns policy page.

In most cases we have the facilities to offer you different colours of a product, specific to your requirements. Minimum order quantities may apply depending on the manufacturing technique in question, but please get in touch with any queries you may have.

Please note that there is a minimum order value of £10 through our website (inclusive of VAT).
If you're new to our website you may want to check out our frequently asked questions section for answers to common customer queries.

While browsing the website you may come across abbreviations used for material names that you are unfamiliar with. You can find an explanation for these in our material abbreviations guide.