Common Nut & Washer Types
Which type of Nuts and Washers do you need? There are several to suit various applications. Here we have the most common types.
Below a brief description is given with an illustration to help identify the most common types of nuts and washers. Click on the product title or image to find out more on our website.
NUTS
Which size of socket or wrench do you need for Hexagon Nuts? See our table below.
| NUT SIZE | WRENCH SIZE | NUT SIZE | WRENCH SIZE | |
| M3 | 5.5mm | M12 | 19mm | |
| M4 | 7mm | M16 | 24mm | |
| M5 | 8mm | M20 | 30mm | |
| M6 | 10mm | M24 | 36mm | |
| M8 | 13mm | M27 | 41mm | |
| M10 | 17mm | M30 | 46mm |
HEXAGON NUT
Six sided nut also known as a fullnut. Where these have a reduced height they are known as half nuts or lock nuts.
NYLON INSERT LOCK NUT
These have a nylon insert which gives a good grip and seal when fastened.
Also known as Nyloc Nuts.
DOME NUT
Provide a decorative finish and protective cover for threaded rod and bolts.
Also known as Cap Nuts
SERRATED FLANGE NUT
With an added flange these give good grip and resist vibration.
Also known as face nuts, spin locks or serrated tooth nuts.
SHEAR NUT
Provides a permanent fastening with the nut shearing off to leave a tamper proof cone when tightened.
BOW NUT
Used for loading and as a restraint, the SWL information is forged on the side of each piece.
Also known as lifting eyes.
CHANNEL NUT
Provide a quick way of connecting channel with bracketry. They are available with spring to help hold in place while positioning.
Also known as zebs or zebedees.
WEDGE NUT
For use in the 'V' channel of metal deckings. The tapped whole accepts threaded rod or bolts.
Also known as vee nuts.
WASHERS
Washer hole sizes correspond to the bolt or fixing diameter that they fit.
PLAIN WASHER
With a hole in the middle these are used to distribute the load of bolts and nuts when tightened.
PENNY WASHER
Having a much larger outside diameter these spread the load more than other types.
Also known as repair or mudguard washers.
NYLON WASHER
Tough and lightweight they can provide insulation and cushioning with their anti-vibration properties.
RUBBER WASHER
Used in applications where a tight seal or some give is required. They are durable and water resistant.
SPRING WASHER
When the fastener is tightened against it the split closes and helps prevent loosening.
SHAKEPROOF WASHER - INTERNAL
Have intenally placed teeth that resist vibration and lock when tightened on.
SHAKEPROOF WASHER - EXTERNAL
Have externally placed teeth that resist vibration and lock when tightened on.
SQUARE PLATE WASHER
Provide a larger bearing surface than round washers. Often used in conjunction with metal channel support systems.
LIPPED SQUARE PLATE WASHER
The shape gives extra strength when used with channel support systems.
RUBBER ANTI-VIBRATION SQUARE WASHER
Flexible, durable and water resistant these provide excellent anti-vibration properties.
