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M3.5 x 75mm Flat Head Countersunk Electrical Screw - Nickel (100 Pack)

£699
The RRP is the manufacturer's recommended retail price of the item.
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Description

The M3.5 x 75mm flat head countersunk electrical screw is a machine screw designed for fixing screwless and flat plate sockets and switches to UK back boxes. The countersunk head sits flush with the faceplate surface when driven fully home, preventing screw heads from protruding beyond the plate and interfering with the screwless cover clip mechanism.

The 75mm length is required when fixing through a thick screwless faceplate and sub-frame assembly into a standard metal back box. The M3.5 thread diameter matches the fixing lugs on Knightsbridge and most other UK electrical accessory back boxes. The nickel finish on the screw provides corrosion resistance in residential and light commercial installations.

Supplied in a 100-pack, the quantity is sufficient for approximately 12-14 double-gang screwless sockets or switches, depending on whether each faceplate uses six or eight fixing points. The screws are machine-threaded rather than self-tapping, so they pair with the pre-threaded fixing lugs on metal back boxes without requiring pilot holes or excessive torque.

Specification
Diameter 3.5 mm
Length 75 mm
Warranty 1
Downloads

Product Specification Sheet

Frequently Asked

What are these screws used for?

These are designed for fixing screwless and flat plate electrical accessories to UK back boxes. The 75mm length accommodates the thickness of a screwless faceplate plus the sub-frame that sits behind it, reaching into the back box fixing lugs.

Will these fit standard UK back boxes?

Yes. The M3.5 thread diameter matches the fixing lugs on standard metal back boxes used throughout the UK electrical accessory market, including Knightsbridge, MK, BG Electrical and most other manufacturers.

How many screws are needed per socket or switch?

Most screwless double-gang sockets and switches use six to eight screws depending on the design. Single-gang accessories typically use four screws. A 100-pack covers approximately 12-14 double-gang installations.

Can these be used with standard screw-fixed faceplates?

The 75mm length is too long for standard screw-fixed faceplates, which typically need 30-40mm screws. These are specifically sized for the thicker assembly created by screwless plates with separate sub-frames.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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    Description

    The M3.5 x 75mm flat head countersunk electrical screw is a machine screw designed for fixing screwless and flat plate sockets and switches to UK back boxes. The countersunk head sits flush with the faceplate surface when driven fully home, preventing screw heads from protruding beyond the plate and interfering with the screwless cover clip mechanism.

    The 75mm length is required when fixing through a thick screwless faceplate and sub-frame assembly into a standard metal back box. The M3.5 thread diameter matches the fixing lugs on Knightsbridge and most other UK electrical accessory back boxes. The nickel finish on the screw provides corrosion resistance in residential and light commercial installations.

    Supplied in a 100-pack, the quantity is sufficient for approximately 12-14 double-gang screwless sockets or switches, depending on whether each faceplate uses six or eight fixing points. The screws are machine-threaded rather than self-tapping, so they pair with the pre-threaded fixing lugs on metal back boxes without requiring pilot holes or excessive torque.

    Specification
    Diameter 3.5 mm
    Length 75 mm
    Warranty 1
    Downloads

    Product Specification Sheet

    Frequently Asked

    What are these screws used for?

    These are designed for fixing screwless and flat plate electrical accessories to UK back boxes. The 75mm length accommodates the thickness of a screwless faceplate plus the sub-frame that sits behind it, reaching into the back box fixing lugs.

    Will these fit standard UK back boxes?

    Yes. The M3.5 thread diameter matches the fixing lugs on standard metal back boxes used throughout the UK electrical accessory market, including Knightsbridge, MK, BG Electrical and most other manufacturers.

    How many screws are needed per socket or switch?

    Most screwless double-gang sockets and switches use six to eight screws depending on the design. Single-gang accessories typically use four screws. A 100-pack covers approximately 12-14 double-gang installations.

    Can these be used with standard screw-fixed faceplates?

    The 75mm length is too long for standard screw-fixed faceplates, which typically need 30-40mm screws. These are specifically sized for the thicker assembly created by screwless plates with separate sub-frames.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.