Seals & O-Rings

Seals and O-rings are used to join two parts of a machine, engine or other mechanical assembly by filling the space between both parts, creating a filled and seal space in between. This seal prevents particle, vapour and fluid leakage to protect and maintain pressure whilst keeps debris out, ensuring proper function and safety. Seals and O-rings are used in various fields and industries including automotive, aerospace and general engineering.

How do seals and O-rings work?
A seal or O-ring is seated in a groove in one of the two parts to be joined then compressed between these two components to the corresponding groove creating a securely sealed joint. They can be used in dynamic joints where there is movement as well as in static or fixed applications.

Types of seals and O-rings
Seals and O-rings come in various materials suited to different purposes. Some have a high temperature tolerance for use in both hot and cold applications, while others are made to be chemically resistant for use in lab or test equipment. Available in a wide range of sizes both in single size packs or in seal and O-ring kits for general maintenance or when looking after a range of sealed part to ensure the correct size is available.

Seals and O-rings are typically made of elastomers like nitrile rubber and silicone, but they also come in plastics, metals and other materials. This variety of material allows for specific seal and O-rings to be used to ensure the best fitting and most reliable seal.

Sizes vary between seal and ring types both in diameter and thickness, these variations help provide an exact and precise seal to protect the joint. Both Metric and Imperial sizes are available to replace new and old seals and rings whether maintaining modern parts or older machines, engines and other mechanical parts.

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Description Price Inside Diameter Outside Diameter Thickness Type Material Minimum Operating Temperature Maximum Operating Temperature CETOP Mounting
RS Stock No. 128-849
BrandRS PRO
£3.32
1 Bag of 50
Bag(s)
12.1mm 15.3mm 1.6mm O-Ring Seal Nitrile Rubber -30°C +120°C -
RS Stock No. 689-502
BrandRS PRO
£16.47
1 Bag of 50
Bag(s)
27.05mm 34.93mm 2.5mm Bonded Seal Nitrile Rubber -10°C +80°C -
RS Stock No. 128-899
BrandRS PRO
£3.32
1 Bag of 50
Bag(s)
9.6mm 14.4mm 2.4mm O-Ring Seal Nitrile Rubber -30°C +120°C -
RS Stock No. 689-473
BrandRS PRO
£9.74
1 Bag of 50
Bag(s)
13.74mm 20.57mm 2.03mm Bonded Seal Nitrile Rubber -10°C +80°C -
RS Stock No. 245-9612
BrandRS PRO
£96.86
1 Kit
Kit(s)
- - - Metric O-Ring Splicing Kit Viton® - - -
RS Stock No. 689-574
BrandRS PRO
£2.37
1 Bag of 50
Bag(s)
1/8in 1/4in 1/16in O-Ring Seal Nitrile Rubber -30°C +120°C -
RS Stock No. 521-5752
BrandRS PRO
£36.89
Each
Units
- 25.4mm - O-Ring Seal Carbon Steel, Stainless Steel - - -
RS Stock No. 689-495
BrandRS PRO
£12.60
1 Bag of 50
Bag(s)
21.54mm 28.58mm 2.5mm Bonded Seal Nitrile Rubber -10°C +80°C -
RS Stock No. 128-906
BrandRS PRO
£3.65
1 Bag of 50
Bag(s)
11.6mm 16.4mm 2.4mm O-Ring Seal Nitrile Rubber -30°C +120°C -
RS Stock No. 128-984
BrandRS PRO
£5.26
1 Bag of 50
Bag(s)
2.9mm 6.35mm 1.78mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C -
RS Stock No. 128-855
BrandRS PRO
£3.52
1 Bag of 50
Bag(s)
14.1mm 17.3mm 1.6mm O-Ring Seal Nitrile Rubber -30°C +120°C -
RS Stock No. 689-518
BrandRS PRO
£25.96
1 Bag of 50
Bag(s)
33.89mm 42.8mm 2.5mm Bonded Seal Nitrile Rubber -10°C +80°C -
RS Stock No. 749-682
BrandRS PRO
£1.148
Each (In a Pack of 4)
Units
40mm 53 → 58mm 9mm V-Ring Seal Nitrile Rubber -40°C +100°C -
RS Stock No. 129-094
BrandRS PRO
£11.40
1 Bag of 50
Bag(s)
15.54mm 20.63mm 2.62mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C -
RS Stock No. 128-805
BrandRS PRO
£3.01
1 Bag of 50
Bag(s)
4.1mm 7.3mm 1.6mm O-Ring Seal Nitrile Rubber -30°C +120°C -
RS Stock No. 689-596
BrandRS PRO
£2.37
1 Bag of 50
Bag(s)
3/16in 5/16in 1/16in O-Ring Seal Nitrile Rubber -30°C +120°C -
RS Stock No. 129-044
BrandRS PRO
£5.86
1 Bag of 50
Bag(s)
9.25mm 12.7mm 1.78mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C -
RS Stock No. 689-530
BrandRS PRO
£9.86
1 Bag of 50
Bag(s)
12.7mm 18mm 1.5mm Bonded Seal Nitrile Rubber -10°C +80°C -
RS Stock No. 128-928
BrandRS PRO
£4.25
1 Bag of 50
Bag(s)
19.5mm 25.5mm 3mm O-Ring Seal Nitrile Rubber -30°C +120°C -
RS Stock No. 128-978
BrandRS PRO
£5.86
1 Bag of 50
Bag(s)
39.5mm 45.5mm 3mm O-Ring Seal Nitrile Rubber -30°C +120°C -
Related Products
RS Pro metric O-Rings made from Nitrile, the ...
Description:
RS Pro metric O-Rings made from Nitrile, the most widely used elastomer in the seal industry. These O-Rings have an excellent resistance to petroleum products and work well in either low or high temperatures. Nitrile is highly resistant to abrasion and is an ideal choice in most industries. • Nitrile ...
These seals comprise a metal annulus to which ...
Description:
These seals comprise a metal annulus to which a medium nitrile elastomeric ring of trapezoidal cross-section is bonded. They provide high and low pressure sealing for ports on fluid systems where mineral based hydraulic fluids or mineral based engine lubricating oils are present. Available in both metric and BSP-based Imperial ...
RS Pro imperial O-Rings made from Nitrile, the ...
Description:
RS Pro imperial O-Rings made from Nitrile, the most widely used elastomer in the seal industry. These O-Rings have an excellent resistance to petroleum products and work well in either low or high temperatures. Nitrile is highly resistant to abrasion and is an ideal choice in most industries. • Nitrile ...