JUST plastic CAPS AND PLUGS? – who are we?

Thredgards are a UK based manufacturer of a wide range of plastic caps and plugs & custom injection mouldings. We cover various industries such as automotive, packaging, food packaging, oil & gas, engineering, hydraulics, construction and leisure. 

In order to achieve this we are certified to the following standards by Alcumus Isoqar: 

ISO 9001:2015

ISO 14001:2015  

Our passion for protecting the environment means our products are 100% recyclable and reusable. They can also be made in biodegradable material as well as recycled landfill material.

The product range of caps and plugs is competitively priced, high quality and can often be delivered to you the next day. 

Incorporated on 31st October 1962 and for over 60 years now, we have built up an expertise within the company that is respected and valued throughout the industry. As a result, some of our customers have been with us for over 35 years.

Exporting our injection mouldings to customers all over the world, we pride ourselves on four main attributes:



At Thredgards, we pride ourselves in industry expertise:

Caps and plugs for all industries

Moulding materials

Capabilities and processes

3D Modelling prototypes

Customer Service

Some of our employees have worked for the business for over 40 years meaning they have a thorough knowledge of our business, products and customers.

Further to this, the expertise is passed on through training and apprenticeship schemes to preserve the heritage and knowledge pool within the company.


Our products are designed and manufactured to a high and precise specification.

We follow a concept of continuous improvement, listening to customer feedback, checking for faults and defects, making adjustments when required.

We are certified to ISO9001:2015 with our partners Alcumus Isoqar


We help our customers from the design stage of a project to its completion. This results in producing the right end solution and total customer satisfaction with no delays.  Because of this, we have customers come to us with concepts and ideas and we have worked with them to guide them through to product launch.


See our Custom Mouldings Page


93% of orders of our caps and plugs are fulfilled on the same day they are received due to the stock control measures in place. This coupled with dialogue with our customers helps us to ascertain the stock levels needed on a monthly or annual basis.

Service levels

We pride ourselves on our quality of service and speed of delivery with customers being able to deal with the same people each time they call. Most products can be dispatched the same day to arrive next day should this be required.

Regardless of whether you are a small, medium or global company you will get a professional level of customer service from us.

With over 60 years combined service with Thredgards in the managerial team as well as over 60 years experience in the industry, we can also help you in the early stages of design to enable your business to provide a turnkey solution for your customers. We also can send you free samples of any of our products.



Soaring Energy Bills

Please see the following STV interview when Thredgards were asked about the impact of soaring energy bills on the business. Many businesses have been and are continuing to be advesrely affected by these conditions. This is resulting in downstream increases in...

Is Plastic Really Evil? The Thredgards’ Opinion

Is Plastic Really Evil? There’s a lot of press around just now about how evil plastic is and how we must eliminate it from our lives. As usual, there are many myths and differing opinions on the subject. Firstly, we have to separate single use plastics from reusable...

Not Just Mouse Clicks

Not just mouse clicks? What are we on about? OK, so you can buy anything you like online now. Including plastic caps and plugs and yes, including Thredgards plastic caps and plugs.  In fact, we are happy if you buy from our online web...

Supply Chain Management or Chained to Supplier Management?

Are you drawn towards the same suppliers again and again?   Is it a case of Supply Chain Management or Chained to Supplier Management? Are you juggling dealing with multiple suppliers for the same products?  Wouldn’t it be a great timesaver to...

Thredgards SPE Offshore – as seen on TV

Check out what Thredgards General Manager, David Haswell had to say on our stand at Offshore Europe 2019.
Great to be able to show how our reusable and recyclable plastic products can be used in a responsible way.


Request Free Samples

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Quick Contact


Milne House, Ward Street, Alloa, Clackmannanshire
United Kingdom FK10 1ET


01259 218181


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Cert 10060 ISO9001:2015

UKAS badge

Cert 10060