Category Archives: hexagon bolts

Carbon Steels, hexagon bolts, hexagon nuts

Bolting Property Classes 8.8 10.9 12.9 & 14.9

Bolting Property Classes 8.8 10.9 12.9 & 14.9

Have you ever stopped to think what the carbon steel bolting grade numbers signify. They’re not just random digits used to identify a material grade. These grade are stipulated in various international standards including DIN 267 and ISO 898. The specific detail should be verified from the required standard directly but as a general guide this feature will assist.

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The symbol for the property classes of hex bolts, screws and studs consists of two numbers separated by a decimal point. 8.8, 10.9, 12.9, 14.9 etc.

Take the whole number before the decimal point. This number, when multiplied by a hundred, gives you the nominal tensile strength in newtons per millimetre squared.

The digit following the decimal point, multiplied by ten, gives you the yield stress ration, or the percentage ratio between the lower yield stress and the nominal tensile strength.

If you now multiply the first number by 10 times the second number you will arrive at the notional yield stress in newtons per millimetre squared.

The main characteristic property of Nuts is the thread stripping strength (proof stress).

The property classes of nuts are designated by a number which indicates the maximum appropriate property class of bolt with which they should be fitted. Therefore nut property classes are the same as the bolt designation initial number.

Internationally, mechanical stress is expressed in newtons per square area, in bolting N/mm2. Common practise overseas is to use the unit megapascal (MPa), which corresponds directly to N/mm2.
For example 1,200 N/mm2 = 1,200 MPa

An example using a hex bolt with property class 10.9

The Nominal tensile strength of a 10.9 bolt is calculated
10 x 100 = 1,000 N/mm2 (MPa)

The Yield stress ratio 9 x 10 = 90%

The Yield stress is therefore
90% of 1,000 = 900 N/mm2 (MPa)

Bolts and Studs can be supplied in Property classes
Grade 3.6
Grade 4.6
Grade 4.8
Grade 5.6
Grade 5.8
Grade 6.8
Grade 8.8
Grade 9.8
Grade 10.9
Grade 12.9
Grade 14.9

Nuts Property classes
Grade 6
Grade 8
Grade 9
Grade 10
Grade 12
Grade 14

Nuts of a higher property class can normally be used in the place of nuts of a lower property class.

* Property classes 14.9 are not detailed in the ISO or ANSI standards.

hexagon bolts, hexagon nuts, Stud Bolts

Hexagon Nuts & Hexagon Bolts are the perfect pairing!

Nuts and bolts come in various sizes and are used to hold a number of things together, Hexagon Nuts are used with a parallel bolt to fasten and stack parts together. Both the Hexagon Nuts and bolts are kept together through their friction and compression. In some cases vibration or rotation can cause nuts to loosen, and in certain situations a locking mechanism may be put in place to help keep the parts together. This can include the use of adhesives, lock wire or even oval-shaped threads to minimise the nuts from untightening. The most commonly manufactured nut is the hexagon, it has six sides which allows for easy grasp with a tool in tight spots. Hague Fasteners was founded to manufacture high quality fasteners, from standard sizes all the way to special sizes. The Hexagon Nuts that we manufacture are of a high standard and made from duplex stainless steel. This substance is very strong and is the main reason why we manufacture our fasteners using duplex steel as it is hard-wearing and tough. We also use duplex steel to manufacture our other fasteners, including our Hexagon Bolts and Stud Bolts, all of which are used by a variety of different industries. Hexagon Nuts and Hexagon Bolts are available in a variety of sizes and can be specially designed to meet your exact specification.  

At Hague Fasteners we pride ourselves on the service we provide to our clients, the special fasteners we manufacture are produced within the UK. We concentrate on non-standard sizes and exotic materials for our products, which makes us the leading manufacturer of special fasteners within the UK. Since being founded in 1971 we focus on supplying to many industries around the world, for more information visit our website or contact us directly with any queries you may have. 
custom Made bolts, hexagon bolts, Stud Bolts

Hague Fasteners – The custom made bolts specialists.

For decades Hague Fasteners have manufactured custom fasteners, including stud bolts, hexagon bolts, and critical components to their customers’ exact designs and specifications. Provide them with OEM drawings or customer designs and they will manufacture custom fasteners for clients all over the world in a wide range of sizes and materials to suit their purpose.


Hague have the knowledge, machinery and experience to quote and supply to your exact requirements, including unique applications. They also cater for smaller quantities from 1 to 200 off, and all of their products are made to order.

As well as custom made bolts, Hague Fasteners excel with the manufacture of all Hexagon Headed Fasteners. Many of the Hexagon bolts are manufactured in the Duplex or Super Duplex steels, as well as the more critical high specification Superalloys.


Hague manufacture many of the non-favoured thread forms such as BSW BSF UNC & UNF, although the call for Metric Hexagon Bolts, that are modified versions of existing international standards bolts are becoming a more and more popular. Reverse Engineering from existing samples, fasteners or bolts can be just as effective as creating a new ones too.




Hague Fasteners are extremely proud to have been one of the Original manufacturers of B7/2H Stud bolts Assemblies in the 1970’s, and still to this day provide non-imported, quality assured UK Manufactured items.


Look no further than the experts for all your Custom Made Bolts needs, and drop us a line to discuss your requirements. We will have ANY FASTENER, ANY THREAD, ANY MATERIAL, ANYWHERE, ANYTIME!
hexagon bolts, hexagon nuts, Non-standard socket screws

Why are Hexagon Nuts & Bolts Hexagon?

Hexagon Nuts & Hexagon Bolts

Hexagon nuts and hexagon bolts are probably the most common type of fasteners, they’re used everywhere.
The reason they’re so popular is because the hexagon shape of the head is very versatile, it can be grabbed by tools from all angles and even by hand if need be.

Hexagon nuts use their shape to their advantage. They’re easy to tighten and loosen thanks to their 6 sides, and you can access them from 360 degrees providing there’s space to move your tools.
These hexagon nuts have been around for a long time, they were first documented around the 1700s and they’ve been used ever since.

The same applies to hexagon bolts, they’re easy to tighten and loosen because of their shape.
The reason they’re hexagon nuts and hexagon bolts and not pentagon or octagon is because the side 6 of a hexagon give enough faces for a tool to grip, but not so many that it’s easily rounded off through use over time. Inevitably the hexagon nuts and bolts will lose some of their shape over time but not having too many sides gives them the best possibly chance of lasting longer.

Non-Standard Socket Screws

In a contrast to hexagon nuts and bolts there’s also socket screws / non-standard socket screws.

Non-standard socket screws have a round head, with a hexagon inset in the top of the head. These screws are made to be used with an Allen key and not gripped by the head. Non-standard socket screws differ from standard socket screws by being different shapes and sizes.

Socket screws and non-standard socket screws are used in many different industries, and you tend to find them in a lot of self assembly furniture and on bicycles as well as many other things.

Hague Fasteners

Hague Fasteners are specialist fastener manufacturers, they manufacture and distribute non-standard fasteners.
Fastener Manufacturers, hexagon bolts, hexagon nuts

Fastener Manufacturers Hague Fasteners

Fastener Manufacturers

Hague Fasteners are fastener manufacturers. Fastener is another term for a screw, or a bolt.
Since 1971 Hague Fasteners have been highly rated fastener manufacturers, manufacturing any fasteners including custom and non-standard fasteners for many industries including Construction, Oil & Gas, Mining, Ship Building, Chemical, Water, Power Generation, Transport and Steel Fabrication. As you can see from the large list of industries that Hague Fasteners work within fasteners can be found everywhere.
Hague Fasteners occupy a niche area in the Fastener market, manufacturing and supplying fasteners that are more difficult to obtain and not readily available off the shelf or from general stockists. Along with large stocks of high integrity and super alloy bars allow Hague Fasteners to offer their services as fastener manufacturers on a very short lead time.
A key product that Hague Fasteners manufacture is hexagon nuts and hexagon bolts.

Hexagon Bolts

Hexagon Headed Fasteners are a specialty for Hague Fasteners. Many of the hexagon bolts that the fastener manufacturers create are made from Duplex, Super Duplex Steels or high specification Super Alloys.
Over recent years we have found that the biggest calling is now for Metric hexagon bolts – these are modified versions of existing hexagon bolts.

Hexagon Nuts

Just as with the hexagon bolts, Hague Fasteners excel with hexagon nuts. These nuts are created with Duplex Steel, Super Duplex Steel, or just like the bolts, high spec Super Alloy. Hague Fasteners manufacture all kinds of hexagon nuts, standard and non-standard, but just as with the hexagon bolts they’re biggest area is modified versions of existing hexagon nuts.
Hague Fasteners can also create custom hexagon nuts through OEM drawings and Customer Drawings.

Contact Hague Fasteners

If you’re interested in purchasing fasteners, or need a custom fastener manufactured please contact Hague Fasteners via the website, via telephone on +44 (0)1902 365 866, or via email to sales@haguefasteners.co.uk
Hague Fasteners, hexagon bolts, hexagon nuts

Hague Fasteners – Excelling In The Manufacture Of Hexagon Nuts And Bolts Since 1971

Overview of Hague Fasteners

“Hague Fasteners excel with the manufacture of all Hexagon Nuts. “

Hague Fasteners is a privately owned company which was established in 1971. We manufacture all types of threaded and milled special fasteners in many different types of material. 


We occupy a specific niche in the Fastener marketplace, manufacturing and supplying the more difficult to obtain fasteners, the items that are not readily available from general fastener stockists. 


We manufacture items that you can’t buy off the shelf in batch small to medium quantities.

At Hague Fasteners we supply all kinds of screws, bolts and fasteners – the most common of these being hexagonal nuts & bolts.


We pride ourselves on the quality of our products and we use a wide range of materials across all of our manufacturing, these materials include Carbon Steels, Duplex & Super Duplex, Hastelloy Alloys, Incoloy Alloys, Inconel Alloys, Non Ferrous Alloys, Monel Alloys, Polymers, Stainless Steels, Titanium Alloys.


Hexagonal Nuts and Bolts

Hexagonal is the most common shape for a nut.

Many of the Nuts we manufacture are in the Duplex or Super Duplex steels, or in high specification Super alloys.


Hexagon nuts and hexagon bolts are used everywhere for all different purposes and the hexagonal variants of nuts and bolts are the most popular throughout the world. History suggests that these nuts and bolts may have been around as early as the 1700s.

These nuts and bolts can be found everywhere, from structural supports to vehicles.

Hague Fasteners work with many industries, and almost all of these will use Hexagon Nuts and Bolts. These industries include; Construction, Mining, Oil & Gas, Ship building, Chemical, Water Industry, Power Generation, Transport, Steel Fabrication and Fasteners.

For more information on Hexagon Nuts, Hexagon Bolts and Hague Fasteners visit our website www.haguefasteners.co.ukÂ