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Worcester Bosch Washer Plastic M10 87186820820

Worcester Bosch

Worcester Bosch Washer Plastic M10 87186820820

Plastic M10 washer for Worcester Bosch Greenstar Danesmoor and Heatslave II gas boilers.

At a glance

  • Also known as 2246557
Manufacturer part no.
87186820820
Showing prices

£0.44

£0.37 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

A plastic M10 washer from Worcester Bosch, supplied under part number 87186820820. It is used in the gas boiler assemblies of the Greenstar Danesmoor and Heatslave II ranges, where it seals and spaces an M10 threaded connection. The washer sits within the O-rings, washers and gaskets category of boiler spares.

Signs this part needs replacing

  • Visible cracking, splitting or deformation of the plastic
  • Water weeping or dripping from the joint the washer sits in
  • The washer has hardened, flattened or lost its shape
  • Mineral scale or debris trapped around the washer
  • Leaks that return shortly after a joint is tightened

Before you order

  • Check your boiler model against the fitment list above
  • Confirm the part number 87186820820 matches the one on the existing washer or in the manufacturer's parts list
  • Establish how many washers the repair requires

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.