Materials and Finishes for Fasteners and Fixings

Whilst our customers most typically require security screws and general fixings in steel (self colour or zinc plated) or stainless steel, additional finishes may be in stock for many of our standard screws, nuts, bolts and other fixings. We can also supply fixings manufactured from a range of different materials.

See Materials HERE

Special Finishes for Fasteners and Fixings

Anodised

Anodising, or anodizing, is achieved using an electrolytic passivation process where the natural oxide layer on the metal surface is thickened to create an anodic oxide film. This increases corrosion and abrasion resistance for greater durability.
Find out more about anodised fixings here.

Black Japanned

A black lacquer applied to steel and baked to harden, for a smooth, glossy finish. A high bitumen content provides a quick-drying and durable protective finish. Consists mostly of an asphaltic base dissolved in naphtha or turpentine.
Find out more about black japanned fixings here.

Chemical Black

A black oxide coating used on steel parts (not stainless). The black coating is formed by a reaction between the surface of the material and the salts in the black oxide solution. As with Stayblack the coating has a negligible effect of the dimension of the fixing.
Find out more about chemical black fixings here. 

Chrome

Chrome plating adds a thin layer of chromium by electro plating. This type of coating is decorative as well as providing corrosion resistance. Find out more about chrome fixings here.

Electro brass plated

Process where a thin layer of brass is applied to the fixing for decorative effect.
Find out more about electro brass plated fixings here.

Galvanised

In this process the fixing is hot dipped in zinc to prevent corrosion. The galvanised coating is quite thick, so clearance holes and nuts will need to be tapped oversize to accommodate galvanised bolts. Generally only available on fasteners M8 and above.
Find out more about galvanised fixings here.

Geomet

This zinc flake anticorrosive, low thickness coating is designed to provide consistent tightening performance, even at high temperatures. It can be used with a top coat if required. Various types of Geomet coating are available providing a range of levels of corrosion protection. 
Find out more about geomet fixings here.

Green Chromate

Green chromate is a coating applied to galvanised or zinc plated parts to make them more durable by protecting the zinc from white corrosion, which can be formed if a galvanised product is exposed to moisture for an extended period.
Find out more information about green chromate fixings here.

Nickel

Like chrome plating, nickel plating adds a thin layer of nickel to the surface of the fixing.
Find out more information about nickel fixings here.

Powder Coating

Powder coating is a relatively popular colouring process for fasteners in a number of materials, allowing for a more pleasing aesthetic. The powder coating process uses finely milled particles of pigment and resin, and these are sprayed onto the fastener using an electrostatic spray process.
Find out more about powder coated fixings here.

Sherardised

Sherardising is a form of zinc coating, applied using a diffusion process which results in a very resilient and uniform coating with a matt grey appearance. This is a hard wearing and corrosion resistant zinc finish and is covered by BS 4921, with 2 standards of thickness, 15 or 30 microns. Paint or powder coatings can be applied.
Find out more about sherardised fixings here.

Stayblack finish (for stainless steel items)

Stayblack is a non-electro process used on stainless steel to create a matt black coating. It does not affect the corrosion resistance and maintains its appearance under atmospheric conditions and temperature up to 500°C. This type of finish is used mainly in the automotive and aerospace industries.
Find out more about stayblack finish fixings here.

Xylan Coating

Xylan coating is designed to improve the functionality, performance and lifespan of screws, fasteners and fixings. These coatings typically provide low friction, non-stick properties, chemical resistance and higher working temperatures.
Find out more about xylan coated fixings here.

Zinc and de-embrittled

A plating process can introduce hydrogen atoms between the fixing and the coating, which can cause the fixing to become brittle. De-embrittling means that a further baking process has taken place to remove any hydrogen which may remain and results in a more resilient fixing. Find out more about zinc and de-embrittled fixings here.

Zinc and yellow plated (gold colour)

Zinc plating gives a protective layer to the fixing which gives a good level of corrosion prevention. Further protection is obtained by adding a passivate which results in a yellow (or gold) finish.
Find out more about zinc and yellow plated fixings here.

Materials for Fasteners and Fixings

We supply screws, fasteners and fixings manufactured from specialist grades of stainless steel and other materials suitable for specific applications, many of which are available from stock.

Aluminium

Aluminium is pleasing and even more so when polished – making it a strong choice for when aesthetics in fixings are important. As well as this, aluminium is resistant to corrosion and is non-ferrous, meaning it’s also not magnetic – perfect for screws.
Find out more about Aluminium here.

ASTM A193

ASTM A193 is a specification which includes various grades of ferritic steels and austenitic stainless steels specifically designed for high temperature and high pressure service – each with different service conditions, properties and characteristics.
Find out more about ASTM A193 here.

ASTM A194

ASTM A194 covers a variety of carbon, alloy and martensitic stainless steel nuts in the size range 1/4″ to 4″ and M6 to M100 nominal. Austenitic stainless steel nuts are also covered in the size range 1/4″ and M6 nominal and above.
Find out more about ASTM A194 here.

Brass

Brass is an alloy of copper and zinc, or more the generic name for a range of differing copper-zinc alloys – such as nickel-silvers which are silver coloured copper, nickel and zinc alloys – which can be considered a ‘special brass’.
Find out more about Brass here.

Duplex and Super Duplex Stainless Steel

Duplex is created to try and reach an equal balance between the austenitic and ferritic types of standard steels, which provides a number of advantages in fixings.Super Duplex Stainless Steels are popular due to their impressive combination of attributes. They are able to obtain significantly higher strengths than a number of other alloys.
Find out more about Duplex and Super Duplex here.

Ferralium

Ferralium® 225 – FG46 is a super duplex stainless steel that has been optimised for fastener applications and is regularly used for bolting applications. It possesses high resistance to abrasion, erosion and cavitation erosion.
Find out more about Ferralium here.

Fibreglass

Fibreglass fasteners are ideal for applications that require mechanical fasteners that are non-corrosive, low in conductivity and or transparent to electromagnetic waves.
Find out more about Fibreglass here.

Hastelloy

Hastelloy is a nickel-molybdenum alloy available in a number of different grades – each of which is optimised for a specific purpose. Whilst the different grades are optimised specifically, they all are highly resistant to corrosion – making them perfect as a fixing material.
Find out more about Hastelloy here.

Incoloy

Incoloy belongs to the same family of superalloys as Inconel, but both possess distinct fastener properties. The predominant difference between the two is that Incoloy contains 50% less nickel content than Inconel, and has an iron addition in the alloy. There are a number of particular grades of Incoloy – all of which we can provide.
Find out more about Incoloy here.

Inconel

Inconel is an oxidation-resistant alloy with the ability to retain structural integrity in high temperatures. There are a number of types of Inconel, including Inconel 600, 601, 617, 625, 690, 702, 706, 718, 800 and 903. Each variation has unique traits that are beneficial in a range of circumstances or applications.
Find out more about Inconel here.

Invar and Super Invar

Invar is widely used for low temperature and low expansion applications as it retains high levels of strength and toughness at cryogenic temperatures. Super Invar offers minimal thermal expansion at ambient temperatures.
Find out more about Invar and Super Invar here.

Mild Steel

Mild Steel, sometimes referred to as carbon steel or plain carbon steel is defined as having no more than 2% carbon, as well as no other appreciable alloying element.
Find out more about Mild Steel here.

Molybdenum

Molybdenum is a silvery-white metal that is very ductile and incredibly resistant to corrosion. It easily forms compounds with other elements and is recovered as a by-product from the mining of tungsten or copper.
Find out more about Molybdenum here.

Monel

Monel alloys are nickel-based alloys that contain between 29% and 33% copper, and have been available since 1905. In the early 1900’s it was used as roofing material, countertops, sinks and a number of other appliances but fell behind once the more versatile stainless steels were introduced in the 1950s.
Find out more about Monel here.

Multiple Grades of High Tensile Steel

For fasteners and fixings, high tensile steel is some of the best material on offer – and can be found in a number of homes and auto manufacturing. Ranging from Grade 8.8 to Grade 14.9 (45H).
Find out more about High Tensile Steel here.

Nimonic

Nimonic is a superalloy that offers impressive levels of oxidation resistance and creep resistance at elevated temperatures. It is often found in the automotive and aerospace sectors, while being widely used in gas turbine components and other high temperature applications.
Find out more about Nimonic here.

Nylon

Nylon is an extremely popular plastic for use in fasteners and fixings, and they are especially suited for electronic work. It’s popular due to its high-tensile strength and higher wear resistance than products like aluminium.
Find out more about Nylon here.

Phosphor Bronze

Phosphor Bronze is widely used for components in electrical devices due to its high strength, high melting point and non-magnetic properties. With strong corrosion resistance, it is an ideal choice for coastal or marine applications.
Find out more about Phosphor Bronze here.

Polyoxymethylene

Otherwise known as Acetal or Delrin, Polyoxymethylene is a thermoplastic used in high performance parts that require high durability and stability and low friction.
Find out more about Polyoxymethylene here.

Silicon Bronze

Silicon Bronze fasteners are known for their corrosion resistance, and they are often found in naval construction because of this. Brine, sulphite solutions and gases to not cause silicon bronze to deteriorate or corrode.
Find out more about Silicon Bronze here.

Stainless Steel

Stainless Steel, like a number of other steels, is available in a number of different grades that can be used in a range of fasteners including screws, nuts, bolt and fasteners. Grades 304 (A2 Stainless) and 316 (A4 Stainless) are the most popular but we can provide the entire range.
Find out more about Stainless Steel here.

Tantalum

Tantalum fasteners are best known for its unmatched corrosion resistance in the industry – as they have a similar resistance to glass but the mechanical properties of a metal.
Find out more about Tantalum here.

Titanium

Titanium is a favoured material for a fastener due to the attractive property of being a low-density metal, however, its elastic modulus is another property that makes it such an appreciated metal for internally and externally threaded fasteners. A number of grades are available.
Find out more about Titanium bolts, nuts, screws & washers.

Tungsten

Tungsten is used within a number of industries, including the aerospace industry, heat treating, oil and gas, and even the medical industry. Its high density and mechanical strength is a huge benefit in all of the above industries. Its extremely high density means fasteners are often used in the balancing of rotating parts such as propellers.
Find out more about Tungsten here.

Waspaloy

Waspaloy is a superalloy, hardened by age, known for its superb high strength at elevated temperatures. It is a high-performance nickel, cobalt, chrome and molybdenum alloy which help provide its unique stability in higher temperatures and it’s general strength.
Find out more about Waspaloy here.

Zirconium

A silver-grey metal, Zirconium is highly resistant to corrosion and is unsurprisingly found in alloys that can be found in piping, fittings, and heat exchangers.
Find out more about Zirconium here.