M20 Cable Glands

Cable glands are designed to be attached at the ends of an electrical cable, retaining it to the equipment it's supplying power to. A well-fitted cable gland, such as the popular M20 grade, will help to seal the power cable while holding it securely in place to prevent accidental removal through pulling, twisting, snagging or tripping.

What size is an M20 cable gland?

The term M20 refers to the thread size of the cable gland. A gland with a metric thread has a prefix of the letter 'M' and a nominal diameter number follows, in this case, 20mm.

What do I need to consider when buying M20 cable glands online?

There are a number of variables in the design and manufacture of cable glands, and the ideal choice for the type of cable attachments you need to secure will depend on the specifics of the application and machinery in question.

Some of the more important specifications you'll want to be aware of include:

  • Thread sizing - threading gauges for cable glands are often given in standard metric sizes (M6, M8, M20 etc), as well as in Panzergewinde or ‘PG' sizes for some models.
  • Brand - our M20 cable glands range includes products from such trusted manufacturers and suppliers as ABB, Alpha Wire, Harting, HellermannTyton, RS PRO and Moflash.
  • Material - choose from a wide variety of materials for different applications and install locations, including brass, nickel-plated brass, rubber, nylon, fibreglass, polyamide, and coated zinc.
  • Cable diameter - minimum and maximum cable widths are an important variable when shopping for suitably sized cable glands, and can range from 4mm up to 20mm and more.
  • IP rating - this indicates the level of protection against ingress and is always given as a two-digit number. The first digit denotes protection level against dirt and particle ingress, while the second refers to moisture protection. (See our full guide to IP ratings for more information.)
  • Locknuts - many M20 cable glands come with a locking nut preinstalled.
  • Operating temperature - the maximum and minimum rated operating temperatures will be clearly stated on the product packaging, or in the manufacturer guidelines.

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Description Price Thread Size Material Maximum Cable Diameter Minimum Cable Diameter Colour IP Rating Minimum Operating Temperature Maximum Operating Temperature Fire Behaviour Hazardous Area Certification Locknut Included Series Standards Met
RS Stock No. 669-4673
BrandRS PRO
£3.00
1 Bag of 5
Bag(s)
M20 Nylon 66 14mm 10mm Black IP68 -60°C +85°C - - Yes - UL 94 V-2
RS Stock No. 669-4660
BrandRS PRO
£4.01
1 Bag of 5
Bag(s)
M20 Nylon 9mm 4mm Black IP68 -60°C +85°C - - Yes - UL 94 V-2
RS Stock No. 669-4664
BrandRS PRO
£4.54
1 Bag of 5
Bag(s)
M20 Nylon 12mm 6mm Black IP68 -60°C +85°C - - Yes - UL 94 V-2
RS Stock No. 831-9024
BrandRS PRO
£4.02
Each (In a Pack of 5)
Units
M20 Nickel Plated Brass 14mm 8mm Metallic IP68 -40°C +100°C - - Yes - RoHS Compliant
RS Stock No. 127-647
BrandRS PRO
£0.712
Each (In a Pack of 5)
Units
M20 Plastic 7mm 4mm Black IP55 -20°C +80°C Low Smoke & Fume (LSF) - Yes - EN 60423, UL 94 V-2
RS Stock No. 127-170
BrandRS PRO
£0.599
Each (In a Pack of 100)
Units
M20 Plastic 7mm 4mm Black IP55 -20°C +80°C Low Smoke & Fume (LSF) - Yes - EN 60423, UL 94 V-2
RS Stock No. 127-631
BrandRS PRO
£0.70
Each (In a Pack of 5)
Units
M20 Plastic 10.5mm 7mm Black IP55 -20°C +80°C Low Smoke & Fume (LSF) - Yes - EN 60423, UL 94 V-2
RS Stock No. 127-215
BrandRS PRO
£0.958
Each (In a Pack of 5)
Units
M20 Plastic 13mm 8mm Black IP55 -20°C +80°C Low Smoke & Fume (LSF) - Yes - EN 60423, UL 94 V-2
RS Stock No. 608-941A
BrandRS PRO
£1.914
Each (In a Pack of 100)
Units
M20 Brass 10mm 8mm Brass - - - - - - - -
RS Stock No. 608-941
BrandRS PRO
£3.70
Each (In a Pack of 5)
Units
M20 Brass 10mm 8mm - - - - - - - - -
RS Stock No. 835-4112
BrandRS PRO
£4.50
Each
Units
M20 Brass 12mm 6mm Metallic IP68 -40°C +100°C - - Yes - CE, RoHS Compliant
RS Stock No. 822-9741
BrandRS PRO
£0.863
Each (In a Pack of 10)
Units
M20 Nylon 66 14mm 10mm Grey IP68 - - - - Yes - UL 94 V-2
RS Stock No. 127-338
BrandRS PRO
£0.644
Each (In a Pack of 5)
Units
M20 Plastic 7mm 4mm White IP55 -20°C +80°C - - Yes - EN 60423, UL 94 V-2
RS Stock No. 822-9776
BrandRS PRO
£0.746
Each (In a Pack of 10)
Units
M20 Nylon 66 14mm 10mm White IP68 - - - - Yes - UL 94 V-2
RS Stock No. 127-243
BrandRS PRO
£0.628
Each (In a Pack of 5)
Units
M20 Plastic 10.5mm 7mm White IP55 -20°C +80°C - - Yes - EN 60423, UL 94 V-2
RS Stock No. 264-7336
BrandRS PRO
£45.65
1 Bag of 5
Bag(s)
M20 Nickel Plated Brass 11mm 7mm Metallic IP68 -40°C +135°C - - No - CE, EN 50262
RS Stock No. 822-9782
BrandRS PRO
£0.517
Each (In a Pack of 10)
Units
M20 Nylon 66 14mm 10mm White IP68 - - - - Yes - UL 94 V-2
RS Stock No. 127-619
BrandRS PRO
£0.58
Each (In a Pack of 100)
Units
M20 Plastic 10.5mm 7mm Black IP55 -20°C +80°C Low Smoke & Fume (LSF) - Yes - EN 60423, UL 94 V-2
RS Stock No. 822-9757
BrandRS PRO
£0.742
Each (In a Pack of 10)
Units
M20 Nylon 66 14mm 10mm Grey IP68 - - - - Yes - UL 94 V-2
RS Stock No. 127-401
BrandRS PRO
£0.798
Each (In a Pack of 5)
Units
M20 Plastic 13mm 8mm White IP55 -20°C +80°C - - Yes - EN 60423, UL 94 V-2