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. 689-619
BrandRS PRO
SGD5.45
1 Bag of 50
Bag(s)
1/4in 3/8in 1/16in O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 255-3360
Mfr. Part No.722969
SGD20.20
1 Bag of 2
Bag(s)
17mm 28mm 7mm Shaft Seal Nitrile Rubber -30°C +110°C
RS Stock No. 129-038
BrandRS PRO
SGD12.31
1 Bag of 50
Bag(s)
7.65mm 11.11mm 1.78mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C
RS Stock No. 749-575
BrandRS PRO
SGD1.368
Each (In a Pack of 4)
units
5mm 9.5 → 10.5mm 3.7mm V-Ring Seal Nitrile Rubber -40°C +100°C
RS Stock No. 129-044
BrandRS PRO
SGD12.89
1 Bag of 50
Bag(s)
9.25mm 12.7mm 1.78mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C
RS Stock No. 689-580
BrandRS PRO
SGD7.05
1 Bag of 50
Bag(s)
5/32in 9/32in 1/16in O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 308-1046
Mfr. Part No.SP-304004/SEAL
BrandSKF
SGD15.71
Each
units
30mm 40mm 4mm Shaft Seal Nitrile Rubber -40°C +80°C
RS Stock No. 527-9762
BrandRS PRO
SGD12.48
1 Bag of 50
Bag(s)
4.47mm 5/16in 1.78mm O-Ring Seal Silicone -60°C +200°C
RS Stock No. 527-9740
BrandRS PRO
SGD12.00
1 Bag of 50
Bag(s)
2.9mm 1/4in 1.78mm O-Ring Seal Silicone -60°C +200°C
RS Stock No. 527-9784
BrandRS PRO
SGD12.78
1 Bag of 50
Bag(s)
6.07mm 3/8in 1.78mm O-Ring Seal Silicone -60°C +200°C
RS Stock No. 128-990
BrandRS PRO
SGD11.02
1 Bag of 50
Bag(s)
3.68mm 7.14mm 1.78mm O-Ring Seal Fluorocarbon Elastomer -20°C +200°C
RS Stock No. 749-610
BrandRS PRO
SGD1.388
Each (In a Pack of 4)
units
14mm 21.5 → 23.5mm 5.5mm V-Ring Seal Nitrile Rubber -40°C +100°C
RS Stock No. 128-883
BrandRS PRO
SGD6.40
1 Bag of 50
Bag(s)
7.6mm 12.4mm 2.4mm O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 689-732
BrandRS PRO
SGD17.79
1 Bag of 50
Bag(s)
7/8in 1 1/8in 1/8in O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 527-9914
BrandRS PRO
SGD28.74
1 Bag of 50
Bag(s)
21.82mm 1-1/8in 3.53mm O-Ring Seal Silicone -60°C +200°C
RS Stock No. 749-597
BrandRS PRO
SGD1.335
Each (In a Pack of 4)
units
10.5mm 17.5 → 18.5mm 5.5mm V-Ring Seal Nitrile Rubber -40°C +100°C
RS Stock No. 527-9813
BrandRS PRO
SGD20.99
1 Bag of 50
Bag(s)
9.19mm 9/16in 2.62mm O-Ring Seal Silicone -60°C +200°C
RS Stock No. 128-962
BrandRS PRO
SGD12.41
1 Bag of 50
Bag(s)
32.5mm 38.5mm 3mm O-Ring Seal Nitrile Rubber -30°C +120°C
RS Stock No. 879-2713
Mfr. Part No.40413725
SGD28.35
Each
units
75mm 95mm 10mm Shaft Seal 72 NBR 902 -30°C +100°C
RS Stock No. 255-3809
Mfr. Part No.722338
SGD13.79
1 Bag of 2
Bag(s)
38mm 52mm 7mm Shaft Seal Nitrile Rubber -30°C +110°C