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. 129-050
BrandRS PRO
£9.95
1 Bag of 50
Bag(s)
9.19mm 3/8in 2.62mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C
RS Stock No. 128-877
BrandRS PRO
£3.10
1 Bag of 50
Bag(s)
6.6mm 11.4mm 2.4mm O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 211-8721
BrandRS PRO
£6.31
1 Pack of 5
Pack(s)
6mm 16mm 7mm Shaft Seal Nitrile Rubber -40°C +100°C
RS Stock No. 211-9005
BrandRS PRO
£1.52
Each (In a Pack of 5)
Units
25mm 35mm 7mm Shaft Seal Nitrile Rubber -40°C +100°C
RS Stock No. 689-625
BrandRS PRO
£2.66
1 Bag of 50
Bag(s)
5/16in 7/16in 1/16in O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 129-066
BrandRS PRO
£10.69
1 Bag of 50
Bag(s)
10.77mm 15.87mm 2.62mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C
RS Stock No. 128-940
BrandRS PRO
£5.06
1 Bag of 50
Bag(s)
26.5mm 32.5mm 3mm O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 749-660
BrandRS PRO
£0.798
Each (In a Pack of 4)
Units
31mm 41 → 44mm 7.5mm V-Ring Seal Nitrile Rubber -40°C +100°C
RS Stock No. 689-603
BrandRS PRO
£2.44
1 Bag of 50
Bag(s)
7/32in 11/32in 1/16in O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 689-552
BrandRS PRO
£13.57
1 Bag of 50
Bag(s)
18.7mm 26mm 1.5mm Bonded Seal Nitrile Rubber -10°C +80°C
RS Stock No. 749-632
BrandRS PRO
£0.705
Each (In a Pack of 4)
Units
20mm 29 → 32mm 7.5mm V-Ring Seal Nitrile Rubber -40°C +100°C
RS Stock No. 527-9863
BrandRS PRO
£12.70
1 Bag of 50
Bag(s)
17.12mm 7/8in 2.62mm O-Ring Seal Silicone -60°C +200°C
RS Stock No. 211-8793
BrandRS PRO
£1.364
Each (In a Pack of 5)
Units
10mm 22mm 7mm Shaft Seal Nitrile Rubber -40°C +100°C
RS Stock No. 211-8771
BrandRS PRO
£1.306
Each (In a Pack of 5)
Units
10mm 19mm 7mm Shaft Seal Nitrile Rubber -40°C +100°C
RS Stock No. 689-697
BrandRS PRO
£4.44
1 Bag of 50
Bag(s)
11/16in 7/8in 3/32in O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 527-9835
BrandRS PRO
£11.62
1 Bag of 50
Bag(s)
12.37mm 11/16in 2.62mm O-Ring Seal Silicone -60°C +200°C
RS Stock No. 211-9055
BrandRS PRO
£1.57
Each (In a Pack of 5)
Units
30mm 40mm 7mm Shaft Seal Nitrile Rubber -40°C +100°C
RS Stock No. 749-654
BrandRS PRO
£0.773
Each (In a Pack of 4)
Units
27mm 37 → 39mm 7.5mm V-Ring Seal Nitrile Rubber -40°C +100°C
RS Stock No. 211-8800
BrandRS PRO
£1.364
Each (In a Pack of 5)
Units
12mm 22mm 7mm Shaft Seal Nitrile Rubber -40°C +100°C
RS Stock No. 527-9778
BrandRS PRO
£5.97
1 Bag of 50
Bag(s)
5.28mm 11/32in 1.78mm O-Ring Seal Silicone -60°C 200°C
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