---
title: "Supply of Flask Seals, Gaskets & 'O' Rings"
ocid: "ocds-b5fd17-e492634e-9ac2-4df1-b787-5ab7d30368ac"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-e492634e-9ac2-4df1-b787-5ab7d30368ac"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-e492634e-9ac2-4df1-b787-5ab7d30368ac.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-e492634e-9ac2-4df1-b787-5ab7d30368ac.json"
source: "Contracts Finder"
current_stage: "Award"
buyer: "SELLAFIELD LTD"
published: "2026-03-30"
---

# Supply of Flask Seals, Gaskets & 'O' Rings

Buyer: SELLAFIELD LTD  
Current stage: Award  
OCID: ocds-b5fd17-e492634e-9ac2-4df1-b787-5ab7d30368ac

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[Download OCDS JSON](https://d3tenders.com/contract/ocds-b5fd17-e492634e-9ac2-4df1-b787-5ab7d30368ac.json)

## Summary

The procurement process for the "Supply of Flask Seals, Gaskets & 'O' Rings" has been managed by Sellafield Ltd, headquartered in Warrington, United Kingdom. The procurement, categorised under the industry of gaskets, involved the supply of specialised seals, gaskets, and 'O' rings for nuclear transport flasks. This process reached the award stage with a contract value of £400,000, and the tender period concluded on 11th March 2026. The contract is set to run from 12th March 2026 to 20th February 2030, with the geographic focus in the North West of England. The procurement method used was classified as "Other," and the process has been completed.

This tender presents a lucrative opportunity for businesses specialising in the manufacture and supply of industrial gaskets and seals, specifically those with capabilities in nuclear-certified products. Although this particular procurement did not express suitability for SMEs or VCSEs, larger companies with established supply chains and specialised expertise could find substantial growth potential in fulfilling such contracts. Organisations in the nuclear, transport, or high-precision manufacturing sectors, especially those familiar with stringent industry standards, would be well-poised to compete for similar tenders. James Walker UK Ltd, a large-scale supplier, was the awarded contractor for this procurement.

## Notice

Supply of Nuclear Transport Flask Specialised Seals Gaskets & 'O' Rings

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/3acccc3c-e89b-4117-9eae-dfc3635e408e |
| Notice type | Award Notice |
| Procurement type | Standard |
| Procurement category | Goods |
| Procurement method | Not Specified |
| Procurement method details | Other - |
| Tender suitability | Not specified |
| Awardee scale | Large |
| All stages | Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 30 Mar 2026 |
| Submission deadline | 11 Mar 2026 |
| Future notice date | Not specified |
| Award date | 12 Mar 2026 |
| Contract period | 12 Mar 2026 - 20 Feb 2030 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £400,000 |
| Lots value | Not specified |
| Awards value | £400,000 |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Complete |
| Lots status | Not specified |
| Awards status | Active |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | SELLAFIELD LTD |
| Locality | WARRINGTON |
| Post town | Warrington |
| Postcode | WA3 6GR |
| Country | England |
| ITL 1 | TLD North West (England) |
| ITL 2 | TLD6 Cheshire |
| ITL 3 | TLD61 Warrington |
| Local authority | Warrington |
| Electoral ward | Birchwood |
| Westminster constituency | Warrington North |
| Delivery location | TLD North West (England) |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | JAMES WALKER |

## CPV Codes

### Divisions

- 34 - Transport equipment and auxiliary products to transportation

### Codes

- 34312500 - Gaskets

## Release History

- 30 Mar 2026 at 14:23 - Award - Award Notice - https://www.contractsfinder.service.gov.uk/Notice/3acccc3c-e89b-4117-9eae-dfc3635e408e

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/3acccc3c-e89b-4117-9eae-dfc3635e408e
  30th March 2026 - Awarded contract notice on Contracts Finder

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-b5fd17-e492634e-9ac2-4df1-b787-5ab7d30368ac. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-b5fd17-e492634e-9ac2-4df1-b787-5ab7d30368ac.json.