Materials and Finishes

Below, we list the common materials and finishes we supply fasteners in. If you're looking for something that's not on this list, please get in touch as we will be able to supply it!

Standard Materials

Mild Steel

Mild Steel is ductile and tough. It can be machined or welded easily and is inexpensive.

High Tensile Steel, Grade 8.8

Similar to mild steel, but with a higher tensile strength (circa 800MPa)

High Tensile Steel, Grade 10.9

Similar to grade 8.8 steel, but with a higher tensile strength (circa 1,040MPa)

High Tensile Steel, Grade 12.9

Similar to grade 10.9 steel, but with a higher tensile strength (circa 1,220MPa)

High Tensile Steel, Grade 14.9

Similar to grade 12.9 steel, but with a higher tensile strength (circa 1,400MPa). As standard this tends to be seen in grub screws.

Stainless Steel, A2-70 / Grade 304

A general purpose stainless steel which strikes a good balance between corrosion-resistance and cost.

Stainless Steel, A4-70 / Grade 316

Often referred to as 'marine grade' stainless steel due to it's excellent anti-corrosion properties, making it great for saltwater resistance.

Stainless Steel, A4-80

The same excellent corrosion-resistance of A4-70, with the added benefit of higher tensile strength.

Stainless Steel, Bumax® 88

A premium option which provides the excellent corrosion resistance of A4, and tensile strength roughly equivalent to High Tensile Steel, Grade 8.8.

Stainless Steel, Bumax® 109

A premium option which provides the excellent corrosion resistance of A4, and tensile strength roughly equivalent to High Tensile Steel, Grade 10.9.


Copper tends to be used on fasteners where electrical and thermal conductivity is critical. It is also corrosion resistant, and non magnetic - but not very strong.


A mixture of copper and zinc: while brass isn't the strongest material, brass is anti-corrosive and water resistant, and can also be the right choice aesthetically if the fastener is on display.


Nylon has high tesile strength and wear resistance, as well as strong resistance to many chemicals. It is also extremely light.


A premium alternative to Nylon, Peek is stronger and more resistant to chemicals and corrosion.


Aluminium is lightweight, corrosion resistant, and conductive (both electrically and thermically).

ASTM A193 B7
ASTM A193 B8, Class 1
ASTM A193 B8, Class 2
ASTM A193 B8M, Class 1
ASTM A193 B8M, Class 2

ASTM A194 Grade 2
ASTM A194 Grade 2H
ASTM A194 Grade 2HM
ASTM A194 Grade 4
ASTM A194 Grade 7
ASTM A194 Grade 7M
ASTM A194 Grade 7L
ASTM A194 Grade 8
ASTM A194 Grade 8M

Special Materials

Duplex Stainless Steel
Super Duplex Stainless Steel

Hastelloy B-2 Series

Hastelloy B-2 has high resistance to acidic environments at all temperatures. As a result, it is often used in chemical appliations.

Hastelloy C Series

Hastelloy C has similar corrosion resistance properties to B-2. The main difference is it has a higher tensile strength.

Incoloy 825

Incoloy 825 is resistant to many different corrosive environments, and maintains good mechanical properties from moderate to high temperature environments.

Inconel 600

Inconel 600 is very resistant to heat and corrosion, without compromising on strength.

Inconel 718

Inconel 718 has similar properties to Inconel 600 - but with higher tensile strength and hardness even at high temperatures.

Inconel X-750

Inconel X-750 is very resistant to corrosion and oxidisation, as well as being very high strength even at high temperatures.




Extremely lightweight, but also extremely strong and corrosion resistant. Titanium is the perfect option for situations where every gram of weight counts.

Monel 400

Monel 400 is strong, and extremely resistant to corrosion especially in marine settings.

Monel K-500

Monel K-500 combines Monel 400's strong corrosion resistance with even higher tensile strength.



Carpenter Alloy 20Cb-3


Sandvik 254 SMO

Silicon Bronze

Silicon Bronze is an alloy made up of various different metals. It is extremely corrosion resistant, in particular when it comes to resisting corrosion caused by salt water. It also has a higher tensile strength than the other metals in this family.

Phosphor Bronze

Phosphor bronze is is known for being particularly tough and resistant to wear.

Aluminium Bronze

Aluminium bronze is another type of bronze alloy that is strong, resistant to wear, and corrosion resistant.

Nickel Brass

Generally selected for aesthetic reasons, Nickel Brass has all the properties of brass, but with a silver finish.

Copper Nickel / Cupronickel

Copper Nickel is extremely strong, resistant to wear, resistant to corrosion, and able to withstand high temperatures.


Self Colour

A plain black finish, with no additional plating. Best suited for indoor use as corrosion resistance is minimal.

Bright Zinc Plated

Bright zinc plating offers excellent corrosion resistance, protecting the component underneath.

Zinc Yellow Plated
Hot-dip Galvanised

Galvanisation is when a component is dipped in molten zinc. This provides a higher level of corrosion resistance than standard zinc electroplating.

Silver Plated

Silver plated components are highly electrically conductive, corrosion resistant, and anti-bacterial.

Gold Plated

Gold plated components are highly electrically conductive and corrosion resistant.

Chrome Plated

Kolsterising® massively increases the hardness and improves the mechanical wear properties of a component, without affecting its corrosion resistance.

WS2 Coating

WS2 coating acts as a lubricant and can extend the life and durability of fasteners.

MOS2 Coating

MOS2 coating acts as a lubricant and can extend the life and durability of fasteners.

PTFE / Teflon Coating
Dacromet Coating

Drilling / Venting
Thread Locking