O-Ring Cords

O-rings are commonly used between two parts to create a seal, preventing gas or liquid from escaping. The O-ring is placed within a groove to keep it in place and then compressed by the parts on either side to ensure a flush seal. While there are many different sizes and diameters of O-ring available, there may be times when there is not a size available that is suitable or when standard sizes are either unavailable or too costly, and it is in these situations that an O-ring cord can be used. An O-ring cord is a rubber cord with a circular profile that can be cut to the required length to form the required seal.

Types of O-Ring Cord

O-ring cords can be found in several different materials. Material selection for any application is based on chemical compatibility, application temperature, sealing pressure, lubrication requirements and durometer, with many options available in the following materials:

  • Nitrile O-rings (NBR)
  • Viton® O-rings (FKM)
  • Silicone O-rings
  • Neoprene® O-rings
  • EPDM O-rings

Where are O-ring cords used?

O-ring cords are commonly used on non-moving machinery and static sealing applications to keep air, other gases and liquids from passing in or out of any given area. They are especially prevalent in pneumatic and hydraulic systems. O-ring cord has a clear advantage for fitting seals to special dimensions that ready-to-buy O-rings may not cater to.


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Description Price Material Diameter Length
RS Stock No. 159-1490
BrandRS PRO
£16.95
1 Reel of 1
Reel(s)
Nitrile Rubber 3mm 8.5m
RS Stock No. 159-1478
BrandRS PRO
£9.33
1 Reel of 1
Reel(s)
Nitrile Rubber 1.6mm 8.5m
RS Stock No. 245-9634
BrandRS PRO
£40.52
1 Reel of 1
Reel(s)
Elastomer 1.6mm 8.5m
RS Stock No. 245-9656
BrandRS PRO
£45.03
1 Reel of 1
Reel(s)
Elastomer 3mm 8.5m
RS Stock No. 159-1484
BrandRS PRO
£13.57
1 Reel of 1
Reel(s)
Nitrile Rubber 2.4mm 8.5m
RS Stock No. 245-9640
BrandRS PRO
£42.78
1 Reel of 1
Reel(s)
Elastomer 2.4mm 8.5m
RS Stock No. 245-9678
BrandRS PRO
£96.81
1 Reel of 1
Reel(s)
Elastomer 5.7mm 8.5m
RS Stock No. 159-1507
BrandRS PRO
£22.04
1 Reel of 1
Reel(s)
Nitrile Rubber 5.7mm 8.5m
RS Stock No. 159-1513
BrandRS PRO
£27.97
1 Reel of 1
Reel(s)
Nitrile Rubber 8.4mm 8.5m
RS Stock No. 245-9684
BrandRS PRO
£209.39
1 Reel of 1
Reel(s)
Elastomer 8.4mm 8.5m
RS Stock No. 138-1605
BrandRS PRO
£19.50
1 Reel of 1
Reel(s)
Nitrile Rubber 4.5mm 8.5m
RS Stock No. 138-1606
BrandRS PRO
£20.35
1 Reel of 1
Reel(s)
Nitrile Rubber 5mm 8.5m
RS Stock No. 138-1607
BrandRS PRO
£21.19
1 Reel of 1
Reel(s)
Nitrile Rubber 5.33mm 8.5m
RS Stock No. 138-1608
BrandRS PRO
£22.90
1 Reel of 1
Reel(s)
Nitrile Rubber 6mm 8.5m
RS Stock No. 138-1609
BrandRS PRO
£24.59
1 Reel of 1
Reel(s)
Nitrile Rubber 7mm 8.5m
RS Stock No. 138-1599
BrandRS PRO
£10.17
1 Reel of 1
Reel(s)
Nitrile Rubber 1.78mm 8.5m
RS Stock No. 138-1610
BrandRS PRO
£26.28
1 Reel of 1
Reel(s)
Nitrile Rubber 8mm 8.5m
RS Stock No. 138-1600
BrandRS PRO
£11.88
1 Reel of 1
Reel(s)
Nitrile Rubber 2mm 8.5m
RS Stock No. 138-1604
BrandRS PRO
£18.65
1 Reel of 1
Reel(s)
Nitrile Rubber 4mm 8.5m
RS Stock No. 138-1602
BrandRS PRO
£17.81
1 Reel of 1
Reel(s)
Nitrile Rubber 3.5mm 8.5m
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