Metric Galvanised Nuts for Trade & Fabrication

Bremick Acorn Nuts provide a practical closed-end fastening solution for fabrication, machinery, equipment & general trade applications where exposed bolt threads need to be covered.

Also known as dome nuts or cap nuts, these fasteners feature a rounded closed end that encloses the terminating thread of a compatible bolt or stud. Bremick metric galvanised acorn nuts are suited to professional fastening jobs where thread compatibility, bolt projection, finish & a neat completed assembly all matter.

► Closed-end design covers projecting bolt threads
► Metric sizes for compatible threaded fasteners
► Galvanised finish for added corrosion protection
► Suitable for fabrication, maintenance & equipment assembly
► Rounded dome creates a neat finished fastening point

For other fastening requirements, explore Industrial Shed's Nuts & Washers range.

Where Bremick Acorn Nuts Work Best?

An ordinary hex nut remains open at the top, allowing the bolt or stud to project through it. An acorn nut closes off the end of the connection with a rounded dome.

This makes closed-end nuts useful where exposed thread is undesirable or where the finished fastening point remains visible.

Common applications include:

► Metal fabrication & fabricated frames
► Machinery guards & equipment covers
► Workshop assemblies
► Brackets, fixtures & exposed hardware
► Maintenance & equipment repairs
► General industrial assembly
► Presentation-sensitive metalwork

The nut still needs to suit the complete fastening system. Thread specification, bolt length, washers, material, finish & operating conditions should all be considered before installation.

Choosing The Right Metric Acorn Nut

Start with the bolt or stud already specified for the job.

A nut that appears to be the right diameter may not have the correct thread. Both the nominal diameter & thread pitch must match the mating fastener.

Bremick's galvanised acorn nut range includes M10, M12 & M16 metric sizes.

► M10 acorn nuts – for compatible M10 threaded fasteners
► M12 acorn nuts – for compatible M12 threaded fasteners
► M16 acorn nuts – for compatible M16 threaded fasteners

When replacing existing hardware, identify the original thread rather than relying on appearance alone. Similar-looking fasteners can use different thread specifications.

Need matching bolts, threaded rod or related fastening components? Browse the Industrial Shed Bolt Bar range.

Check Bolt Projection Before Fitting A Dome Nut

Bolt length matters when working with dome nuts because the top of the nut is closed.

With a standard open nut, additional thread can project through the top. With an acorn nut, the projecting bolt or stud must fit within the available internal space.

If the thread extends too far, the bolt can reach the inside of the dome before the nut has properly tightened against the assembly.

Before fitting:

► Confirm the correct thread diameter & pitch
► Assemble washers & other components in their intended positions
► Check how much bolt thread remains exposed
► Make sure there is enough internal clearance inside the nut
► Confirm adequate thread engagement
► Follow specified tightening requirements for the assembly

Never continue tightening simply to overcome incorrect bolt projection or mismatched threads.

Why Choose Galvanised Acorn Nuts?

Bremick specifies these metric acorn nuts with a galvanised finish.

Galvanising provides additional protection against corrosion compared with untreated steel, making the finish useful across many trade, construction & industrial applications.

The operating environment still needs to be considered when selecting fasteners. Exposure to moisture, weather, chemicals or aggressive conditions can affect the suitability of the complete fastening system.

Before choosing a galvanised fastener, consider:

► Where the assembly will be installed
► Exposure to moisture & weather
► Materials used in adjoining components
► Required service life
► Maintenance requirements
► Any engineering or project specifications

For structural, engineered or safety-critical connections, always use the fastener type, grade, dimensions & finish specified for the job.

Acorn Nuts, Dome Nuts & Cap Nuts

Acorn nuts, dome nuts & cap nuts are common terms for the same general style of closed-end nut.

Rather than allowing a bolt or stud to pass through the top, the nut incorporates an enclosed dome that covers the terminating thread.

Terminology can vary between manufacturers & suppliers, so check the product specification when ordering.

Key details include:

► Thread diameter
► Thread pitch
► Metric or imperial thread
► Material
► Surface finish
► Nut dimensions
► Internal clearance

Matching these details is more reliable than selecting a fastener by name or appearance alone.

Acorn Nuts for Fabrication & Maintenance

Fabricators can select the nut, bolt & washer combination together before an assembly reaches production. This makes it easier to control thread engagement & minimise unnecessary bolt projection.

Maintenance work can require a different approach because the original fastening specification may not always be available.

When replacing an existing cap nut:

► Inspect the bolt or stud for damaged threads
► Measure the thread diameter
► Confirm the thread pitch
► Check the existing finish
► Inspect surrounding clearance
► Compare the replacement against the original fastening arrangement

If the mating bolt has damaged threads, replacing the nut alone may not correct the problem.

A Better Way To Specify Repeat Fastening Jobs

Workshops producing the same assemblies regularly can reduce mistakes by recording the complete fastening combination instead of ordering each component separately from memory.

A basic job specification can record:

► Bolt type & length
► Thread diameter & pitch
► Nut type & size
► Washer specification
► Material & finish
► Quantity required per assembly

This is particularly useful for fabrication businesses, maintenance departments & workshops carrying multiple similar-looking metric fasteners.

Businesses purchasing fasteners & workshop supplies regularly can also review Industrial Shed's Trade Account Support.

Practical Tips Before Installation

Start the nut by hand. A compatible thread should engage cleanly. Immediate resistance can indicate damaged, dirty or mismatched threads.

Check the bolt length. A bolt that projects too far can bottom against the closed end of the nut.

Inspect mating threads. Remove contamination & check for burrs or damage before assembly.

Account for washers. Adding or removing washers changes the final bolt projection.

Match the finish to the environment. Consider where the assembly will operate rather than choosing a coating based on appearance.

Follow the specified fastening procedure. Critical assemblies may have defined fastener grades, tightening requirements or torque specifications.