Here’s a list of some leading national suppliers of threaded plastic plugs in the United Kingdom:

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Leading Suppliers of Threaded Plastic Plugs in the UK

1. Essentra Components

   • Website: essentracomponents.com
   • Description: A global manufacturer and distributor of essential components, including a variety of plastic plugs.

2. Apollo Plastic

   • Website: apolloplastics.co.uk
   • Description: Specializes in plastic and packaging solutions, offering a wide range of plastic plugs and caps.

3. Caplugs

   • Website: caplugs.com
   • Description: Offers a wide variety of plastic plugs and protective solutions for various industries.

4. ProPlas

   • Website: proplas.co.uk
   • Description: A plastic specialist providing custom and standard plastic products, including threaded plugs.

5. The Plastic People

   • Website: theplasticpeople.co.uk
   • Description: A provider of plastic products and solutions, featuring threaded plastic plugs in their catalog.

6. Amdar Ltd

   • Website: amdar.co.uk
   • Description: Known for manufacturing and supplying plastic products, including threaded plugs for various applications.

7. Bagatelle Plastics

   • Website: bagatelleplastics.co.uk
   • Description: Offers a range of plastic products, with options for threaded plastic plugs.

8. Rochelle Plastics

   • Website: rochelleplastics.co.uk
   • Description: Suppliers of a wide range of plastic components, including threaded plugs.

9. Plastics Direct

   • Website: plasticsdirect.co.uk
   • Description: Provides a comprehensive range of plastic products including plugs and fittings.

10. Simply Plastics

    • Website: simplyplastics.com
    • Description: Retailer of plastic materials and products, with a selection of threaded plastic plugs. ```

This list offers a starting point to explore the suppliers of threaded plastic plugs in the UK. For the most current information on products and services, I recommend visiting their respective websites.