Domed Nuts

Domed nuts are a popular fastening option that is commonly used across the UK markets. They are valued for their aesthetic appeal and ability to enclose an exposed thread. The base of a domed nut is similar to a standard hex nut, but it features a rounded, dome shaped top half. The domed nut's base and domed top are made from one piece of metal. The domed shape of the nut had led to many people commonly describing them as domed nuts. It is also popular to refer to them as acorn nuts, again due to their shape, which resembles that of an acorn nut from an oak tree.

There are several key advantages to using domed nuts on an application. The primary is the ability to cover exposed ends of threads. This can be important when considering safety implications, as exposed metal threads can cause damage to objects that they come into contact with. In terms of health and safety, it may also be important to cover them in case of human contact with the sharp exposed edges. A domed nut will generally be constructed from a shiny, polished metal and this also provides a decorative finish to an application. For this reason you will commonly see them used in furniture assembly or architectural elements in large structures. Additionally, stainless steel domed nuts provide a good level of protection to the thread they are applied to. We sell stainless steel acorn nuts in both M2 and M4 grades of stainless steel and these will help to protect the thread that they are placed on from corrosion. M4 or marine grade domed nuts can even be used in harsh industrial or coastal environments and will continue to perform well for long periods with minimal corrosion.

Domed nuts are commonly known as acorn nuts due to their distinctive shape. They might also be called cap nuts, due to the role they play in covering exposed threads and nuts. Dome head nuts is another popular term for the product. Some less often used terms include crown nuts, blind nuts and top nuts. We describe our product range as stainless steel domed nuts, to emphasise that they are constructed from the highest quality grade of materials. Finally, the more technically minded consumer may use a DIN number to describe the domed nuts. For our range of stainless steel acorn nuts, this would be din1587.

We stock dome nuts in metric thread sizes ranging from M3 all the way up to M36. However, if you need a size that isn't listed or require non-metric sizes, please contact us as we can supply additional dimensions. Our top selling domed nuts are the m6 dome nut and m8 dome nut. Customers also often purchase m10 dome nuts and m12 dome nuts for their projects. Other trending thread sizes include m4 dome nuts, m5 dome nuts and m16 dome nuts.

For applications where our customers desire a darkened finish on their stainless steel domed nuts, we are pleased to offer a unique variety of black dome nuts and black acorn nuts. These dome head nuts are chemically treated to add a permanent black colour to the dome nuts. Please note that due to the costs involved with this specialist service, it is only available with a minimum order quantity. For more information please enquire using our contact us page.

The differences here lie in the categorisation of fastener products and both terms will generally be used to refer to the same product - domed hex nuts. A cap nut is technically a sub-category range of nuts that may feature a few different shapes such as domed, hexagonal or cylindrical. However, a dome nut refers specifically to domed nuts, with their distinctive acorn shape. The most important thing to remember is that both terms are used to describe essentially the same product. A dome nut is a type of cap nut and they are both most commonly used for covering and protecting exposed bolts, nuts, threads and rods.

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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.