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Worcester Bosch Cap Nut 1 1/2 Inch BSP Pump Nut 87161405150

Worcester Bosch

Worcester Bosch Cap Nut 1 1/2 Inch BSP Pump Nut 87161405150

1 1/2 inch BSP cap nut (pump nut) for Worcester Bosch gas and oil boilers, part number 87161405150.

At a glance

  • Also known as 1017385
Manufacturer part no.
87161405150
GC number
325-158
Showing prices

£11.92

£9.93 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

The Worcester Bosch 87161405150 is a 1 1/2 inch BSP cap nut, also known as a pump nut. It secures and seals the pump connection on Worcester gas and oil boiler models. It is supplied as a single component for use when servicing or replacing the pump.

Signs this part needs replacing

  • Water weeping or dripping from the pump connection
  • Visible corrosion or scale on the nut
  • Rounded or damaged hex flats from previous tightening
  • The nut will not seal against the pump housing
  • Loose nut allowing pump movement or vibration

Before you order

  • Confirm the thread size required is 1 1/2 inch BSP
  • Check your boiler model against the fit list above
  • Inspect the pump connection for damage to the mating face

Not sure which part?

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