Nuts
Nuts are what keep bolted fixings tight on site, from steelwork and brackets to plant repairs, trunking, strut and heavy timber connections.
When you're fastening anything that needs to stay put, the right nuts matter just as much as the bolt. Hex nuts are your standard go-to, nyloc nuts help stop vibration working things loose, and choosing the right thread, finish and nut sizes saves stripped fixings and call-backs later. If you're matching up Nuts, Bolts & Washers for site work, this is where to get the right ones first time.
What Are Nuts Used For?
- Securing brackets, channel, tray and support frames on first fix jobs where a solid threaded fastening is quicker and stronger than relying on screws alone.
- Locking off plant guards, machine covers and site fittings where vibration can work standard fixings loose and nyloc nuts earn their keep.
- Assembling timber, steel and mixed-material connections on sheds, gates, workbenches and structural pack jobs where bolts need a dependable threaded finish.
- Finishing exposed threaded ends on external or visible installs where dome nuts or stainless steel nuts give a cleaner result and better weather resistance.
- Handling maintenance repairs on vans, trailers, access gear and workshop kit where matching the right nut sizes to existing threads saves cross-threading and wasted time.
Choosing the Right Nuts
Sorting the right nuts is simple: match the thread, the load and the job conditions before you buy a box.
1. Match the Thread Size Exactly
If the bolt is M8, you need an M8 nut. Same for M10 and every other size. Do not guess by eye, because the wrong thread will either bind, strip or feel like it fits until it fails under load.
2. Pick the Right Nut Type for Movement
If the fixing is going on static brackets or general steelwork, standard hex nuts are usually right. If it is going on machinery, trailers, gates or anything that rattles and vibrates, go straight to nyloc nuts or another proper lock nut.
3. Think About Weather and Corrosion
For indoor dry work, standard finishes are fine. If the fixing is outside, in damp plant rooms or exposed to wash-down, stainless steel nuts are worth it because rusty threads are a pain when you need to service or remove them later.
4. Do Not Ignore Access and Finish
If you need fast hand adjustment on covers or temporary rigs, wing nuts save time. If the thread end is exposed where people can catch hands or clothing, dome nuts give a tidier and safer finish than leaving bare threaded ends sticking out.
Who Uses These on Site?
- Steel erectors and fabricators use hex nuts every day for bolted connections, brackets and frame assembly where they need a straightforward fastening they can torque up properly.
- Sparkies reach for m8 nuts and m10 nuts when fixing tray, basket, channel and plant supports, usually alongside threaded rod and strut on first and second fix.
- Groundworkers and landscapers use nuts on gates, posts, boundary jobs and external metalwork where stainless steel nuts make more sense in wet conditions.
- Mechanical fitters and maintenance teams swear by nyloc nuts and lock nuts on vibrating equipment, guarding and machinery because they stay tighter for longer.
- Joiners and site carpenters use wing nuts and dome nuts on jigs, access panels and exposed fixings where quick adjustment or a neater finish matters.
Fixing Accessories That Make Nuts Easier to Fit Properly
A few basics make bolted fixings quicker to assemble and far less likely to work loose or damage the material.
1. Washers
Get a set of Washers with your nuts. They spread the load, stop the nut chewing into softer material and help you get a cleaner, tighter fit on timber, sheet and slotted brackets.
2. Bolts
It sounds obvious, but too many jobs get held up by unmatched threads. Keep the right Bolts with the nuts you're ordering so you are not trying to marry up odd metric and imperial fixings from the van.
3. Set Screws
For brackets, channels and metal connections where you need a full threaded fixing rather than a plain shank bolt, Set Screws are the better match and give you more adjustment through thinner sections.
4. Power Tool Socket Sets
A decent Power Tool Socket Sets setup saves your knuckles and speeds up repetitive assembly. Handy when you're running down dozens of nuts on tray, framing or workshop builds.
Choose the Right Nuts for the Job
Match the nut type to the fixing, movement and environment.
| Your Job | Nuts or Type | Key Features |
|---|---|---|
| General brackets, frames and bolted site fixings | Hex nuts | Standard shape, easy to torque up, suits most everyday metric bolts |
| Machinery, trailers, gates and vibrating assemblies | Nyloc nuts | Nylon insert helps resist loosening where movement would shake a standard nut free |
| External metalwork or damp service areas | Stainless steel nuts | Better corrosion resistance, cleaner threads later when maintenance is needed |
| Exposed thread ends on visible or touchable fixings | Dome nuts | Covers the thread end, neater finish, less chance of catching hands or clothing |
| Quick hand-tightening on covers, jigs and access panels | Wing nuts | No spanner needed, faster adjustment where regular removal is part of the job |
Common Buying and Usage Mistakes
- Buying by look instead of thread size is the big one. An M8 and a similar-looking imperial nut are not close enough, and forcing them together will wreck the threads.
- Using standard hex nuts where the fixing will vibrate usually ends in call-backs. If the job moves, rattles or gets knocked about, use nyloc nuts or a proper lock nut from the start.
- Skipping washers on softer materials can pull the nut into timber, sheet or slotted steel. Use a washer when you need to spread the load and protect the surface.
- Choosing the wrong finish for outside work is false economy. Standard plated nuts soon corrode in wet conditions, so switch to stainless steel nuts where weather is a factor.
- Overtightening smaller nuts strips threads faster than most people think. Tighten to the fixing spec or sensible hand torque, especially on smaller m8 nuts and stainless fixings.
Hex Nuts vs Nyloc Nuts vs Wing Nuts
Hex Nuts
These are the standard choice for most bolted fixings on site. They are quick to fit, easy to torque and right for brackets, frames and general assembly, but they are not the best option where constant vibration is involved.
Nyloc Nuts
Nyloc nuts add resistance against loosening thanks to the nylon insert. They are the better call for moving plant, gate hardware, trailers and machinery, though they are slower to run down and should not be treated as endlessly reusable.
Wing Nuts
Wing nuts are for access, adjustment and hand-tightening rather than heavy clamping force. Good on temporary setups, covers and jigs, but not what you want for structural or high-torque fixings.
Maintenance and Care
Keep Threads Clean
Dirty threads give false resistance and lead to cross-threading. Brush off swarf, rust and site grit before fitting, especially on reused bolts from repair jobs.
Store by Size
Separate nut sizes properly in tubs or organisers. Mixing m8 nuts, m10 nuts and odd leftovers is how you lose time on site and damage good bolts by trying the wrong one in a rush.
Check for Corrosion
If nuts have been stored in damp conditions and the threads are heavily rusted, replace them. A cheap fixing is not worth fighting when the job needs to come apart again later.
Be Sensible with Reuse
Standard nuts can often be reused if the threads are clean and undamaged. Nyloc nuts are different. Once the nylon insert is worn or loose, bin them and fit new.
Replace Rounded or Damaged Nuts
If the flats are rounded off or the threads feel rough, replace the nut. It is far cheaper than wasting time with slipping spanners or cutting seized fixings back off.
Why Shop for Nuts at ITS?
Whether you need standard hex nuts, nyloc nuts, wing nuts, dome nuts or everyday m8 nuts and m10 nuts to match your fixings, we stock the range in depth. It is all in our own warehouse, ready for next day delivery, so you can get the right sizes on site without holding the job up.
Nuts FAQs
What is a nyloc nut?
A nyloc nut is a nut with a nylon insert at the top of the thread. That insert grips the bolt as you tighten it, which helps stop the nut shaking loose on vibrating kit like gates, trailers, machinery and plant guards.
How do I know what size nut fits my bolt?
Match the thread size exactly. If you have an M8 bolt, use an M8 nut. If you have an M10 bolt, use an M10 nut. Do not judge it by eye or across-flats spanner size. Check the thread marking or measure the bolt properly if you are unsure.
What's the difference between a hex nut and a lock nut?
A hex nut is the standard plain nut used for most bolted fixings. A lock nut is designed to resist loosening, usually through a nylon insert or locking form. For static brackets, a hex nut is often fine. For vibration or movement, use a lock nut such as a nyloc.
Can nyloc nuts be reused?
Sometimes, but do not assume they are good forever. If the nylon insert has lost its grip or the nut spins on too easily by hand, replace it. On anything safety-critical or vibration-heavy, fresh nyloc nuts are the safer call.
Do I need a washer with a nut?
Not always, but often yes. A washer spreads the load, helps protect the surface and can stop the nut digging into timber, sheet metal or slotted brackets. On softer materials or oversized holes, it is usually the right thing to fit.
Are stainless steel nuts worth it for outside work?
Yes, if the fixing is going to stay outside or live in damp conditions. Stainless steel nuts cost more up front, but they are far less likely to seize up or rust solid when you need to come back for maintenance.
