Nuts, Bolts, Screws Fasteners & Fixings

Security Fasteners and General Fixings from Stock and to order

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Invar Screws, Fasteners and Fixings

Invar, or Invar 36, is an Iron-Nickel alloy consisting of 64% Iron and 36% Nickel, often combined with trace quantities of other elements such as Manganese and Silicon.

Invar Screws, Fasteners and Fixings

The major advantage of Invar is its ability to retain high strength and toughness at cryogenic temperatures.

It is typically used for low temperature and low expansion applications as a result, often within precision equipment such as thermostats and lasers where changes due to thermal expansion should be minimal.

Invar 42 contains 42% Nickel and has a slightly different coefficient of thermal expansion compared to regular Invar. 

Super Invar, otherwise known as Invar 32-5, is composed with an additional 5% Cobalt and is designed to provide minimal thermal expansion at room temperatures.

If you require more information or would like to order a product made of Invar or Super Invar, please contact us.

See all materials and finishes here.

See all Invar Fasteners HERE.

Featured: M12 Pin TX Button Security Machine Screws


Available now at Fastenright, 6 Lobe Pin TX Button Head Security Machine Screws now in stock in M12 diameter, with lengths available up to 120mm.

Find out more information here.

Specials and non standard fixings

Looking for fixings with an unusual head diameter or thread length?
Need fasteners with a non-standard finish?

Or do you have other special requirements? Custom fasteners are no problem for Fastenright!

Fastener Terminology Glossary

There are a number of confusing names and terms within the Fastener industry, so we have created a handy terminology glossary to help.

Contact Us

The Fastenright specialist team is available to discuss your requirements.

Call us now on +44 (0)1902 457734 or complete our contact form.
We look forward to helping you.

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