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Hamworthy M4 Shakeproof Washer 740154320

Hamworthy

Hamworthy M4 Shakeproof Washer 740154320

Hamworthy M4 internal teeth shakeproof washer for Shaftesbury and Wessex floor standing boilers.

At a glance

  • Also known as 2063490
Manufacturer part no.
740154320
Showing prices

£4.06

£3.38 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

This is an M4 internal teeth shakeproof washer supplied under part number 740154320 by Hamworthy. It is a small fastening component used on Hamworthy Shaftesbury and Wessex floor standing gas boilers. Its internal teeth bite into the mating surfaces to resist vibration-induced loosening of the fastener it sits beneath.

Signs this part needs replacing

  • The washer is missing from a fastener position where it should be fitted.
  • The internal teeth are flattened, worn or no longer grip the fastener or mating surface.
  • Corrosion or pitting is visible on the washer.
  • A fastener on the boiler has begun to loosen or lose torque in service.

Before you order

  • Confirm the fastener the washer fits is M4 threaded.
  • Confirm the washer form is internal teeth, as given by the part number 740154320.
  • Check the appliance model against the fits list above.
  • Check the condition of the fastener and the surrounding joint before refitting.

Not sure which part?

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