Brass, Stainless Steel, Mild Steel, Dish and Cup Engine Core Plugs

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Core Plugs International™ are the only supplier in the UK (and possibly, the world) that stock the biggest range of core plugs & engine core plug sets in various metals.

For custom-sized plugs or sizes not currently listed, a lead time of 6-8 weeks is necessary to finalize specifications and create tooling. Additional fees will be charged.

Bulk discounts are applied automatically at checkout, ranging from 10% to 50% off the total amount (beginning at £20), excluding postage.

Please note: Due to the difference in names, a 'Core Plug' - either 'cup' or 'dish/welch', can be referred to as the following misnomers: Freeze, Frost, Expansion, Saucer and Welsh. See our Frequently Asked Questions page for more information. 

Looking for a set of plugs for a vehicle? Try entering your request in the search bar above; such as an engine type e.g. X20DTL or Astra, 307 or Peugeot etc.

Delivery information | Terms of Sale, Returns & Refunds

 Certificates of Conformity and Initial Sample Inspection Reports are available upon request.  NDA's welcomed.

All brass, mild & stainless steel plugs, including the material they are made from, originate from the UK.