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
RS Stock No. 689-669
BrandRS PRO
£3.33
1 Bag of 50
Bag(s)
1/2in 11/16in 3/32in O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 689-726
BrandRS PRO
£5.95
1 Bag of 50
Bag(s)
13/16in 1 1/16in 1/8in O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 689-546
BrandRS PRO
£11.33
1 Bag of 50
Bag(s)
16.7mm 24mm 1.5mm Bonded Seal Nitrile Rubber -10°C +80°C
RS Stock No. 128-934
BrandRS PRO
£4.74
1 Bag of 50
Bag(s)
24.5mm 30.5mm 3mm O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 128-990
BrandRS PRO
£5.42
1 Bag of 50
Bag(s)
3.68mm 7.14mm 1.78mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C
RS Stock No. 129-088
BrandRS PRO
£10.93
1 Bag of 50
Bag(s)
13.94mm 19.05mm 2.62mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C
RS Stock No. 211-8759
BrandRS PRO
£1.262
Each (In a Pack of 5)
Units
8mm 16mm 7mm Shaft Seal Nitrile Rubber -40°C +100°C
RS Stock No. 527-9942
BrandRS PRO
£14.87
1 Bag of 50
Bag(s)
25mm 1-1/4in 3.53mm O-Ring Seal Silicone -60°C +200°C
RS Stock No. 521-5746
BrandRS PRO
£38.00
Each
Units
- 25.4mm - Mechanical Pump Seal Carbon Steel, Stainless Steel - -
RS Stock No. 211-8765
BrandRS PRO
£1.364
Each (In a Pack of 5)
Units
8mm 22mm 7mm Shaft Seal Nitrile Rubber -40°C +100°C
RS Stock No. 749-698
BrandRS PRO
£1.228
Each (In a Pack of 4)
Units
45mm 58 → 63mm 9mm V-Ring Seal Nitrile Rubber -40°C +100°C
RS Stock No. 689-681
BrandRS PRO
£3.79
1 Bag of 50
Bag(s)
5/8in 13/16in 3/32in O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 128-883
BrandRS PRO
£3.10
1 Bag of 50
Bag(s)
7.6mm 12.4mm 2.4mm O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 128-956
BrandRS PRO
£6.04
1 Bag of 50
Bag(s)
31.5mm 37.5mm 3mm O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 689-568
BrandRS PRO
£16.05
1 Bag of 50
Bag(s)
22.7mm 30mm 2mm Bonded Seal Nitrile Rubber -10°C +80°C
RS Stock No. 129-117
BrandRS PRO
£14.00
1 Bag of 50
Bag(s)
18.72mm 23.81mm 2.62mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C
RS Stock No. 211-8715
BrandRS PRO
£1.262
Each (In a Pack of 5)
Units
5mm 16mm 6mm Shaft Seal Nitrile Rubber -40°C +100°C
RS Stock No. 128-861
BrandRS PRO
£3.10
1 Bag of 50
Bag(s)
5.6mm 10.4mm 2.4mm O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 129-072
BrandRS PRO
£10.93
1 Bag of 50
Bag(s)
12.37mm 17.46mm 2.62mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C
RS Stock No. 527-9762
BrandRS PRO
£5.78
1 Bag of 50
Bag(s)
4.47mm 5/16in 1.78mm O-Ring Seal Silicone -60°C +200°C
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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 ...
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