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IP66 M20 Cable Glands 20mm - 10 Pack Black Nylon

£199
The RRP is the manufacturer's recommended retail price of the item.
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Description

These Knightsbridge M20 cable glands provide IP66-rated cable entry for outdoor electrical enclosures, junction boxes and security camera housings fitted with 20mm knockouts. Each gland is constructed from black nylon with a threaded body, compression seal and locking nut, holding cables between 6mm and 12mm diameter securely while maintaining the IP66 ingress protection rating against dust and powerful water jets.

Designed for outdoor CCTV installations, garden lighting circuits, gate automation and any outdoor electrical installation where cable entry needs to remain weatherproof, the glands thread into standard M20 knockouts found on most IP-rated enclosures and junction boxes. The compression seal grips the cable jacket without crushing the conductors, and the locknut tightens against the enclosure wall to prevent the gland from rotating or backing out under cable tension.

The nylon construction resists UV degradation and remains stable across the temperature range typical of UK outdoor installations. Each gland measures 37mm in total length from the base of the thread to the top of the cable entry dome, with a 25mm hexagonal locknut that can be tightened with a standard adjustable spanner. The pack contains 10 glands, sufficient for a typical 4-camera CCTV installation with spare capacity.

Specification
Length 37 mm
Width 25 mm
Construction Nylon
Finish Black
IP Rating IP66
Warranty 2
Downloads

Product Specification Sheet

Frequently Asked

What cable diameters do these glands accept?

The M20 glands grip cables between 6mm and 12mm outer diameter. The compression seal adjusts to the cable size when the top nut is tightened, maintaining the IP66 seal across this range.

What is an M20 knockout and where is it found?

M20 refers to the 20mm metric thread size. Most outdoor electrical enclosures, junction boxes and camera housings have pre-formed 20mm circular knockouts that can be punched out to accept M20 cable glands.

Can these be used indoors?

Yes. The IP66 rating means they're suitable for both indoor and outdoor use. Indoors they're commonly used in damp locations such as plant rooms, garages and commercial kitchens where IP-rated enclosures are required.

How is the IP66 seal achieved?

The gland body threads into the enclosure knockout with a rubber seal against the enclosure wall, locked by the hexagonal nut. The top compression seal grips the cable jacket when tightened, creating a dual-barrier seal that meets IP66 requirements for dust and water ingress.

Shipping & Returns

Free worldwide delivery

Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

Returns

30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.

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    Description

    These Knightsbridge M20 cable glands provide IP66-rated cable entry for outdoor electrical enclosures, junction boxes and security camera housings fitted with 20mm knockouts. Each gland is constructed from black nylon with a threaded body, compression seal and locking nut, holding cables between 6mm and 12mm diameter securely while maintaining the IP66 ingress protection rating against dust and powerful water jets.

    Designed for outdoor CCTV installations, garden lighting circuits, gate automation and any outdoor electrical installation where cable entry needs to remain weatherproof, the glands thread into standard M20 knockouts found on most IP-rated enclosures and junction boxes. The compression seal grips the cable jacket without crushing the conductors, and the locknut tightens against the enclosure wall to prevent the gland from rotating or backing out under cable tension.

    The nylon construction resists UV degradation and remains stable across the temperature range typical of UK outdoor installations. Each gland measures 37mm in total length from the base of the thread to the top of the cable entry dome, with a 25mm hexagonal locknut that can be tightened with a standard adjustable spanner. The pack contains 10 glands, sufficient for a typical 4-camera CCTV installation with spare capacity.

    Specification
    Length 37 mm
    Width 25 mm
    Construction Nylon
    Finish Black
    IP Rating IP66
    Warranty 2
    Downloads

    Product Specification Sheet

    Frequently Asked

    What cable diameters do these glands accept?

    The M20 glands grip cables between 6mm and 12mm outer diameter. The compression seal adjusts to the cable size when the top nut is tightened, maintaining the IP66 seal across this range.

    What is an M20 knockout and where is it found?

    M20 refers to the 20mm metric thread size. Most outdoor electrical enclosures, junction boxes and camera housings have pre-formed 20mm circular knockouts that can be punched out to accept M20 cable glands.

    Can these be used indoors?

    Yes. The IP66 rating means they're suitable for both indoor and outdoor use. Indoors they're commonly used in damp locations such as plant rooms, garages and commercial kitchens where IP-rated enclosures are required.

    How is the IP66 seal achieved?

    The gland body threads into the enclosure knockout with a rubber seal against the enclosure wall, locked by the hexagonal nut. The top compression seal grips the cable jacket when tightened, creating a dual-barrier seal that meets IP66 requirements for dust and water ingress.

    Shipping & Returns

    Free worldwide delivery

    Free worldwide delivery on all orders over £99. International orders for third-party brand products may be subject to an additional courier surcharge based on volumetric weight, particularly on larger lighting fixtures — if a surcharge applies, our team will email you with the amount before dispatch and you can proceed or cancel for a full refund. See full delivery terms.

    Returns

    30-day returns window from delivery. As all our products are electrical or lighting goods, returned items must be inspected and recertified by a qualified electrician before resale — the cost of this inspection (25–40% of the item value) is deducted from your refund. Customers pay return shipping. Made-to-order, special-order and clearance items cannot be returned. See full returns policy.