25mm ID x 4mm C/S (33mm OD) FKM O Ring
£0.35 – £2.33 / each
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each
total
29 in stock, ready for shipping today.
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FKM (Fluoroelastomer / Viton®) O Rings
376 products
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13.1mm ID x 1.6mm C/S (16.3mm OD) FKM O Ring
£0.12 – £1.23 / each
Waseach totalView specification95 in stock, ready for shipping today.
Add 4 more and save 25.0%.
38mm ID x 4mm C/S (46mm OD) FKM O Ring
£0.25 – £1.65 / each
Waseach totalView specification53 in stock, ready for shipping today.
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57mm ID x 3mm C/S (63mm OD) FKM O Ring
£0.60 – £3.32 / each
Waseach totalView specificationOut of stock.
57mm ID x 2.5mm C/S (62mm OD) FKM O Ring
£0.39 – £2.18 / each
Waseach totalView specification25 in stock, ready for shipping today.
Add 4 more and save 20.0%.
20mm ID x 4mm C/S (28mm OD) FKM O Ring
£0.28 – £2.15 / each
Waseach totalView specification8 in stock, ready for shipping today.
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14.1mm ID x 1.6mm C/S (17.3mm OD) FKM O Ring
£0.12 – £1.23 / each
Waseach totalView specification103 in stock, ready for shipping today.
Add 4 more and save 25.0%.
77mm ID x 3mm C/S (83mm OD) FKM O Ring
£0.96 – £4.80 / each
Waseach totalView specification15 in stock, ready for shipping today.
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30mm ID x 1mm C/S (32mm OD) FKM O Ring
£0.17 – £1.67 / each
Waseach totalView specification209 in stock, ready for shipping today.
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87mm ID x 3mm C/S (93mm OD) FKM O Ring
£0.93 – £4.65 / each
Waseach totalView specification6 in stock, ready for shipping today.
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BS010 FKM O Ring - 6.07mm ID x 1.78mm C/S (9.63mm OD)
£0.04 – £1.20 / each
Waseach totalView specification614 in stock, ready for shipping today.
Add 4 more and save 33.0%.
64mm ID x 3mm C/S (70mm OD) FKM O Ring
£0.35 – £2.30 / each
Waseach totalView specification824 in stock, ready for shipping today.
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About FKM (Fluoroelastomer / Viton®) O Rings
Looking for high-performance O-rings that thrive under heat and chemical pressure? FKM O-rings — also commonly known by the brand name Viton® — are your go-to solution for extreme sealing conditions.
What is FKM?
FKM stands for fluoroelastomer, a premium synthetic rubber designed to withstand:
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Temperatures from –20 °C up to +200 °C (with peaks of 230 °C in some compounds)
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Chemicals like fuels, oils, acids, and solvents
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Ozone, UV and weathering over long periods
This makes them ideal for automotive, aerospace, chemical processing, and high-temperature industrial applications.
FKM vs. NBR / Silicone: What's the Difference?
| Feature | FKM (Viton®) | NBR (Nitrile) | Silicone |
|---|---|---|---|
| Temp Range | –20 °C → +200–250 °C | –40 °C → +120 °C | –50 °C → +200 °C |
| Chemical Resistance | Excellent (fuels, oils, solvents) | Moderate | Poor (especially fuels) |
| Ozone/UV Resistance | Excellent | Poor | Excellent |
| Durability / Cost | High durability, higher cost | Budget friendly | Flexible, mid-price |
Not sure what to choose? Get in touch and we’ll help!
Common Uses of FKM O-Rings
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Fuel injectors & turbo kits
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Industrial pumps and valves
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High-performance engines
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Chemical sealing and lab equipment
Contact us
Here to help
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