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Unicrimp slotted raised countersunk machine screw M3.5 x 40mm QRCSM35X40

Electrical Range

Unicrimp slotted raised countersunk machine screw M3.5 x 40mm QRCSM35X40

Unicrimp M3.5 x 40mm zinc-plated steel slotted raised countersunk machine screw, pack of 100.

At a glance

  • Also known as 8011492
Manufacturer part no.
QRCSM35X40
Showing prices

£20.94

£17.45 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 zinc-plated steel M3.5 machine screw, 40mm long, with a slotted raised countersunk head, made by Unicrimp. It is used to fix wiring accessories such as light switches and socket outlets to their back boxes so the head sits flush.

Signs this part needs replacing

  • The screw head slot is stripped or rounded
  • The screw has rusted or corroded
  • The thread is worn and no longer holds
  • The accessory will not sit flush because the screw is the wrong length

Before you order

  • Confirm the accessory takes an M3.5 thread
  • Confirm 40mm suits the depth of the back box or mounting
  • Count how many screws the job needs before ordering a full pack

Not sure which part?

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