Gaskets & O-Rings

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

RS Components supply a great range of gaskets and seals including nitrile O-rings which have a great resistance to abrasion and can be used for various sealing applications. Our nitrile O-rings are available in both metric and imperial standard sizes. Imperial sizes are usually to BS1806 and Metric sizes are to BS4518.

How do gaskets and O-rings work?

A gasket or O-ring is seated between two parts, often 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 gaskets and O-rings

Gaskets 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. They are available in a wide range of sizes both in single size packs or in kits for general maintenance or when looking after a range of sealed parts to ensure the correct size is available.

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

Sizes vary between 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 gaskets and o-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. 204-0983
Mfr. Part No.118371
SGD11.39
1 Bag of 10
Bag(s)
18.4mm 23.8mm 2.7mm O-Ring Fluorocarbon Elastomer -25°C +200°C
RS Stock No. 196-5434
BrandRS PRO
SGD10.84
1 Bag of 50
Bag(s)
45mm 47mm 1mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 196-5846
BrandRS PRO
SGD16.63
1 Bag of 10
Bag(s)
45mm 51mm 3mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 196-5177
BrandRS PRO
SGD10.58
1 Bag of 5
Bag(s)
130mm 140mm 5mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 196-4884
BrandRS PRO
SGD4.37
1 Bag of 50
Bag(s)
23mm 27mm 2mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 196-5416
BrandRS PRO
SGD4.39
1 Bag of 50
Bag(s)
24mm 26mm 1mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 196-4783
BrandRS PRO
SGD7.08
1 Bag of 25
Bag(s)
34.59mm 39.83mm 2.62mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 196-6023
BrandRS PRO
SGD16.53
1 Bag of 5
Bag(s)
72.62mm 79.68mm 3.53mm O-Ring FKM -15°C +200°C
RS Stock No. 196-5681
BrandRS PRO
SGD8.83
1 Bag of 25
Bag(s)
5.1mm 8.3mm 1.6mm O-Ring FKM -15°C +200°C
RS Stock No. 196-5011
BrandRS PRO
SGD4.32
1 Bag of 50
Bag(s)
4mm 10mm 3mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 196-5550
BrandRS PRO
SGD9.42
1 Bag of 50
Bag(s)
25mm 28.2mm 1.6mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 196-5789
BrandRS PRO
SGD24.54
1 Bag of 25
Bag(s)
22mm 27mm 2.5mm O-Ring FKM -15°C +200°C
RS Stock No. 196-5391
BrandRS PRO
SGD5.03
1 Bag of 50
Bag(s)
5mm 7mm 1mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 196-5656
BrandRS PRO
SGD7.24
1 Bag of 25
Bag(s)
6.5mm 9.5mm 1.5mm O-Ring FKM -15°C +200°C
RS Stock No. 196-5167
BrandRS PRO
SGD7.04
1 Bag of 20
Bag(s)
66mm 76mm 5mm O-Ring Nitrile Rubber -30°C +90°C
RS Stock No. 689-631
BrandRS PRO
SGD6.42
1 Bag of 50
Bag(s)
3/8in 1/2in 1/16in O-Ring Seal Nitrile Rubber -30°C +120°C