RS PRO Black Polyvinyl Chloride 25 mm Cable Grommet for 20.5 mm Cable Dia.

RS Stock No.:: 605-677
Brand:: RS PRO

RS PRO Black Polyvinyl Chloride 25 mm Cable Grommet for 20.5 mm Cable Dia.

Bulk discount available

Subtotal (1 box of 100 units)*

£14.51

(exc. VAT)

£17.41

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

232 unit(s) ready to ship
Plus 98 unit(s) ready to ship from another location
Plus 240 unit(s) shipping from 02 March 2026

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Box(es)	Per Box	Per unit*
1 - 4	£14.51	£0.145
5 - 9	£14.09	£0.141
10 +	£13.67	£0.137

*price indicative

RS Stock No.:: 605-677
Brand:: RS PRO

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	RS PRO
	Product Type	Blind Grommet
	Grommet Type	Cable Grommet
	Panel Hole Diameter	25mm
	Material	Polyvinyl Chloride
	Colour	Black
	Minimum Operating Temperature	-40°C
	Maximum Operating Temperature	130°C
	Maximum Cable Diameter	20.5mm
	Standards/Approvals	ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007

	Select all
	Brand RS PRO
	Product Type Blind Grommet
	Grommet Type Cable Grommet
	Panel Hole Diameter 25mm
	Material Polyvinyl Chloride
	Colour Black
	Minimum Operating Temperature -40°C
	Maximum Operating Temperature 130°C
	Maximum Cable Diameter 20.5mm
	Standards/Approvals ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007

COO (Country of Origin):: GB

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.

Features:

Black PVC

Diaphragm with hole for wire

Dust tight around wire

Pre-formed hole