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What are threaded inserts made of?

What are threaded inserts made of?

Shop for Threaded Inserts
Brass, steel, stainless steel and zinc threaded insert Threaded inserts are available in several different metals, the most common are: brass, steel and zinc. The type used will be dependent on the application and the material to be threaded. There are benefits to each metal.


Brass inserts are easier to manufacture, which means they are cheaper. Brass is also a better heat conductor than steel, which is beneficial for thermal and ultrasonic installation, as the brass insert can be rapidly heated and cooled, reducing the production time. Brass is also reasonably corrosion resistant, which increases the applications in which it is usable.

Brass inserts are most popular for use in plastics because of the advantages for thermal and ultrasonic installation.


steel threaded inserts Steel is used for inserts because it has a high tensile strength and is also generally stronger than brass. It is this which makes it harder to manufacture and subsequently more expensive. However, steel, and more specifically stainless steel, is preferred for many applications, mainly for use in metals (solid and coiled inserts).  
steel infinity shape There are many grades of steel which result in many varying properties for the inserts. If you require inserts for a particularly aggressive environment, ensure you check the grade and whether it is suitable. Think of the environment around the insert when choosing a grade, for example grade 316 stainless steel is best for vigorous water applications.


zinc threaded insert Zinc is used on inserts for soft and engineered wood. Zinc has a low melting point for a metal, which makes it ideal for die-casting with a quick and efficient production process. It is not as strong as brass or steel which is why it is mainly used in woods.Zinc reacts with the oxygen and carbon dioxide in the atmosphere, forming a protective layer preventing corrosion. Zinc is often used to galvanise other metals for this anti-corrosion layer, including some steel threaded inserts. 
Below is a table of metals and the application material/ type of threaded insert for which they are usually used:
table of materials used for threaded insert types
aircraft manufacturing The application must be taken into consideration when purchasing threaded inserts. The conditions, stress and use of the product needing an insert may require specific properties, e.g. an insert made from a strong grade stainless steel may be needed for car parts or a brass insert which reacts better to wet conditions may be suitable for water pipes.
various metal threaded inserts Whilst threaded inserts are usually available in the metals thought most effective, it is possible to order them in alternative materials from some manufacturers. These are then made to order. Other available materials include aluminium and even some plastics.

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