RS PRO Black PVC 25mm Round Blind Grommet for Maximum of 20.5mm Cable Dia.

  • RS Stock No. 605-677
  • Manufacturer RS PRO
Product overview and Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): GB
Product Details

RS Pro Blind Grommets with Diaphragm

This range of RS Pro blind grommets (also known as closed grommets or hole-plugs) feature a diaphragm.

Options available:

605-661 - 20mm
605-677 - 25.5mm

What is a diaphragm?

The diaphragm is a thinner PVC film that sits in the “hole” of the grommet. It surrounds smaller wires securely, for guidance and protection.
A preformed hole enables easy cable entry/exit. The diaphragm sits snug around the wire to provide a dust tight seal which is essential in many electrical installations.

Where are diaphragm grommets used?

RS Pro PVC grommets are popular for use with metal back boxes. They fit into the pre-cut discs on most metal back boxes. Wires are then thread through the hole and supported by the surrounding diaphragm.
The grommet ensures that the wire passes through the hole without coming into contact with the metal box. It also provides protection for the wire.


Black PVC
Diaphragm with hole for wire
Dust tight around wire
Pre-formed hole

Attribute Value
Grommet Type Round
Panel Hole Diameter 25mm
Maximum Cable Diameter 20.5mm
Material PVC
Colour Black
Minimum Operating Temperature -40°C
Maximum Operating Temperature +130°C
Maximum Panel Thickness 1.5mm
8 In stock for delivery within 6 working days
Price (VAT excluded) 1 Box of 100
TWD 430.00
(exc. GST)
TWD 452.00
(inc. GST)
Per Box
Per unit*
1 - 4
5 - 9
10 +
*price indicative