text.skipToContent text.skipToNavigation
Group Page Header - Jacob.png
Cable glands explained - Understand cable gland installation, materials and thread types

Understanding cable glands and the safety they provide

In the world of machine building, every component plays a part in keeping systems safe, efficient and reliable. From motors and control units to connectors and fasteners - each element matters. 

One important component in electrical systems is the cable gland. Often overlooked, this simple part ensures electrical systems remain protected, sealed and long-lasting. 

What is a cable gland?

A cable gland is a mechanical entry device used to attach and secure the end of an electrical cable to a piece of equipment - such as a junction box, enclosure, or control cabinet.


Its job is to provide:

  • A tight seal to prevent dust and moisture ingress
  • Strain relief, protecting cables from tension and movement
  • Electrical insulation and grounding where required
  • A barrier against vibration, chemicals, and temperature extremes

In short, a cable gland maintains the integrity of the enclosure while keeping the electrical connection safe and secure.

 
Cable glands explained - diagram
Cable glands explained - Understand cable gland installation, materials and thread types

Main types of cable glands

Choosing the right cable glands depends on your environment, cable type and safety requirements. There are 4 main types of cable glands: Polyamide (PA6), Brass, Stainless steel and Explosion proof (Ex).

Plastic Cable Glands
(Polyamide PA6)

Best for general purpose and indoor installations.

  • Lightweight and easy to install
  • Some corrosion resistance
  • Cost-effective for large scale projects
  • Typical protection IP68 (5 bar)
  • Temperature range: -20°C to +100°C

Common applications: control panels, lighting systems and automation enclosures.

Brass Cable Glands
(nickel plated)

Engineered for outdoor or mechanical environments where durability is key.

  • Excellent temperature & impact resistance,
  • Vibration-resistant with integrated strain relief,
  • Cost-effective for large scale projects
  • EMC versions available for shielding against interference,
  • Temperature range: -20°C to +100°C

Common applications: machinery, transport systems and power distribution.

Stainless Steel
Cable Glands

Designed for marine, chemical or high-corrosion environments.

  • Ultimate corrosion protection,
  • High mechanical and thermal strength,
  • Typical protection IP68 against ingress of dirt and high pressure liquids.

Common applications: food, pharma petrochemical and offshore installations.

Ex Cable Glands
(Explosion-proof)

Developed specifically for environments where explosion risks are high.

  • Certified for ATEX and IECEx zones,
  • Prevents flame propagation through cable entries,
  • Robust sealing to prevent passage of hot gases or sparks to the explosive environment.

Common applications: chemical plant or refineries.

Cable glands explained - Understand cable gland installation, materials and thread types

Understanding thread types 

Cable glands are commonly available in two thread standards; Pg and Metric. 

Pg (Panzergewinde)

the traditional German standard. This thread has varying pitch and a top angle of 80 degrees. It is typically used for older systems or replacements.

Metric (M)

the global standard (EN 60423). This thread has a consistent 1.5mm pitch and a top angel of 60 degrees. For most modern machine building projects and new installations, metric glands are the preferred choice due to the global standardisation. 

pg vs metric cable glands - Fabory
Cable glands explained - Understand cable gland installation, materials and thread types

Cable Gland Accessories That Make a Difference


A reliable installation depends on more than the gland itself. Complementary accessories ensure performance and longevity. 

  • Locknuts: Secure the gland tightly to the panel. 
  • Reducers: Adapt mismatched thread sizes.
  • Screw plugs: Safely close unused openings.
  • O-rings: Provide extra sealing protections.
Cable Gland accessories, screw plugs, reducers and locknuts
Cable glands explained - Understand cable gland installation, materials and thread types

How to install a cable gland

Installation is simple but precision is key.

1

Step 1 – Preparation of the opening

Taking time to prepare the opening is an essential step to a successful installation. Check the gland's thread type and size matches the enclosure hole.

2

Step 2 – Insertion

Pass the threaded end of the gland through the opening and secure with a locknut.

3

Step 3 – Feed the cable

Pass the cable through the gland and ensure the correct depth and alignment.

4

Step 4 – Tighten

Once alignment is confirmed, tighten the sealing nut, compressing the sealing ring evenly for a watertight and strain relieved connection.

5

Step 5 – Inspection

Inspect the seal - confirm no gaps or movement, and verify the enclosure's IP rating is maintained.

Cable glands at Fabory

As a trusted partner to the machine building and industrial engineering industries, Fabory provides a range of Jacob plastic (Polyamide PA6) and Nickel-plated brass cable glands and accessories  - combining German precision with Fabory's technical expertise and reliable service.

  •  Expert support,
  •  Fast, reliable delivery, 
  •  Vast range of products, sizes & materials, 
  •  Certified quality

Discover the Jacob range or contact our experts for technical advice and quotations.

Contact an Expert      Discover Cable Glands at Fabory

Do not close this page. This message will disappear, when the page is fully loaded.