Description

Dowells Brass Cable Gland 57mm (2-1/4”) – Single/Double Compression

The Dowells Brass Cable Gland 57mm (2-1/4”) – Single/Double Compression is intended for larger industrial cable-entry applications where correct mechanical retention and cable-entry selection are important.

The 57mm size is available in different compression configurations, but the correct gland should not be selected only from the nominal 57mm designation. Dowells’ selection information uses the actual overall cable diameter to determine the appropriate gland. For Single Compression, DGP10013 covers 50.6–57.0 mm. For medium-duty armoured Double Compression, DGP10049/DC-2-1/2″ covers 54.6–63.5 mm.

For a broader selection process covering cable OD, armour, compression type, thread and application, see our Cable Gland Supplier India – Complete Buying Guide.

Dowells 57mm Single Compression Cable Gland

The Dowells DGP10013 is listed in Dowells’ Single Compression range for the 57mm (2-1/4″) size.

According to the published Dowells selection chart, DGP10013 is suitable for an overall cable diameter of 50.6–57.0 mm. This makes the actual cable OD the most important measurement to verify before ordering.

Single Compression Comparison Table

Specification	Dowells 57mm Single Compression
Brand	Dowells
Product	Brass Cable Gland
Nominal Size	57mm
Imperial Reference	2-1/4″
Configuration	Single Compression
Dowells Product Code	DGP10013
Suitable Overall Cable Diameter	50.6–57.0 mm
Material	Brass
Selection Method	Actual cable OD
Application	Industrial cable-entry installations

The 50.6–57.0 mm range is from Dowells’ published selection chart.

Dowells 57mm Double Compression Cable Gland

Double Compression selection needs additional attention because the correct gland depends on the cable type, actual OD and armour arrangement.

For medium-duty armoured brass Double Compression glands, Dowells lists DGP10049 / DC-2-1/2″ for an overall cable diameter of 54.6–63.5 mm. The 2026 Dowells price list also identifies the nipple size for this model as 2-1/2″.

This is an important distinction for a product page titled “57mm”: 57mm is the nominal gland size, not a statement that every 57mm cable has exactly 57mm outside diameter.

Double Compression Comparison Table

Specification	Dowells Double Compression
Brand	Dowells
Product	Brass Cable Gland
Configuration	Double Compression
Applicable Range	Depends on cable construction
Armoured Medium-Duty Product Code	DGP10049
Dowells Cat. No.	DC-2-1/2″
Suitable Overall Cable Diameter	54.6–63.5 mm
Nipple	2-1/2″
Material	Brass
Cable Selection	Actual OD + cable construction + armour
Application	Suitable industrial armoured cable installations

Dowells separately lists Double Compression glands for unarmoured cables, so the armoured DGP10049 specification should not be presented as a universal Double Compression specification for every 57mm cable.

Single Compression vs Double Compression – 57mm

Feature	Single Compression	Double Compression
Dowells product code	DGP10013	DGP10049 for the stated armoured range
Nominal size	57mm / 2-1/4″	DC-2-1/2″ in the stated armoured range
Suitable OD	50.6–57.0 mm	54.6–63.5 mm
Cable construction	Verify application	Verify armour and construction
Main selection factor	Cable OD	Cable OD + construction + armour
Nipple	Verify product configuration	2-1/2″
Recommended approach	Measure cable OD	Measure cable OD and confirm armour
Best for	Appropriate cable-entry applications	Applications requiring Double Compression configuration

How to Select the Correct 57mm Cable Gland

1. Measure the overall cable diameter

The first step is to measure the finished outside diameter of the cable. Do not assume that a cable described by conductor cross-section or a gland’s nominal size gives the correct compression range.

Dowells’ own chart demonstrates this clearly by specifying cable-diameter ranges for each product code.

For more guidance, read:

What Size Cable Gland Do I Need for My Project?

2. Check Single or Double Compression

Determine whether the project requires a Single Compression or Double Compression gland.

For larger industrial cables, the correct choice can depend on cable construction, armour arrangement, equipment entry and project specifications.

Our Armoured vs Unarmoured Cable Glands Guide explains the key differences.

3. Check whether the cable is armoured

Do not use the armoured Double Compression specification for an unarmoured cable simply because both products are described as “57mm”.

Dowells publishes separate Double Compression ranges for armoured and unarmoured cables.

4. Verify the enclosure entry

Before ordering, check:

• Required gland/thread size
• Enclosure opening
• Cable OD
• Cable construction
• Armour dimensions
• Required compression configuration
• Accessories
• Installation environment

This avoids the common problem of ordering a gland based only on its nominal size.

Applications

The Dowells Brass Cable Gland 57mm can be considered for larger cable-entry requirements in industrial electrical installations.

Potential applications include:

• Electrical control panels
• Power distribution systems
• Switchgear installations
• Industrial control equipment
• Junction and terminal boxes
• Electrical enclosures
• Plant electrical installations
• Infrastructure projects
• Industrial machinery
• Power and cable termination systems

The exact application suitability depends on the cable construction, gland configuration, enclosure entry and project specification.

For industrial buyers comparing different gland sizes, our Cable Gland category provides access to the wider range.

Why Choose Thunderbolt Electromech India Pvt. Ltd. for Cable Glands?

Thunderbolt Electromech India Pvt. Ltd. supplies cable glands and electrical accessories for industrial, commercial and project requirements.

Dowells Cable Gland Range

Customers can source different Dowells cable-gland sizes and compression configurations according to their requirements. Thunderbolt’s current website lists Dowells 57mm Single/Double Compression Cable Gland among its cable-gland products.

Product Identification Support

For a product such as a 57mm gland, simply providing “57mm” may not be enough. We recommend providing:

• Brand
• Nominal gland size
• Actual cable OD
• Armoured/unarmoured
• Single/Double Compression
• Required quantity
• Equipment/enclosure entry

This makes product identification much more accurate.

Industrial Supply

Thunderbolt supports requirements from electrical contractors, panel builders, engineers, purchase teams, industries, OEMs and project buyers.

Multiple Cable Gland Sizes

You can compare different sizes through the Thunderbolt Cable Gland category.

Selection-Focused Buying

Our approach is to help buyers select the gland from the actual cable and installation requirements instead of relying only on a nominal size.

For the complete selection methodology, visit the Cable Gland Supplier India – 15 Expert Tips Guide.

Frequently Asked Questions

1. What is the cable diameter range for Dowells 57mm Single Compression Cable Gland?

Dowells’ selection chart lists DGP10013 for 57mm / 2-1/4″, with a suitable overall cable diameter of 50.6–57.0 mm.

2. What is the Dowells product code for 57mm Single Compression?

The Dowells product code is DGP10013 for the 57mm Single Compression gland.

3. Which Dowells Double Compression gland is suitable around 57mm cable diameter?

For medium-duty armoured cable, Dowells lists DGP10049 / DC-2-1/2″, covering 54.6–63.5 mm overall cable diameter. The actual cable OD and construction should still be verified before ordering.

4. Does 57mm Cable Gland mean the cable must be exactly 57mm?

No. 57mm is a nominal gland size/reference. The actual cable diameter must be compared with the manufacturer’s specified cable range. For DGP10013, Dowells specifies 50.6–57.0mm.

5. How do I select the correct Cable Gland for a 57mm cable?

Measure the cable’s actual outside diameter and identify whether it is armoured or unarmoured. Then select the appropriate compression configuration and verify the required thread/entry. Dowells’ selection chart should be used to confirm the applicable product code.

6. Is the 57mm Single Compression gland the same as the 57mm Double Compression gland?

No. They are different compression configurations and can have different product codes and selection ranges. For example, Dowells lists DGP10013 for 57mm Single Compression, while the stated medium-duty armoured Double Compression range uses DGP10049/DC-2-1/2″ for 54.6–63.5mm.

7. Can I use a Double Compression gland for an unarmoured cable?

Do not assume so. Dowells publishes separate Double Compression ranges for armoured and unarmoured cables. The correct product should be selected according to the cable construction and manufacturer’s specification.

8. What information should I provide when ordering a Dowells 57mm Cable Gland?

Ideally provide the actual cable OD, armoured/unarmoured status, Single or Double Compression requirement, required thread/entry and quantity. This allows the correct product configuration to be identified rather than relying only on “57mm”.