22mm ID x 3.5mm C/S (29mm OD) FKM O Ring
£0.13 – £1.33 / each
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each
total
205 in stock, ready for shipping today.
Add 4 more and save 25.0%.
FKM (Fluoroelastomer / Viton®) O Rings
376 products
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20mm ID x 3mm C/S (26mm OD) FKM O Ring
£0.21 – £1.58 / each
Waseach totalView specification558 in stock, ready for shipping today.
Add 4 more and save 25.0%.
9mm ID x 3mm C/S (15mm OD) FKM O Ring
£0.08 – £1.06 / each
Waseach totalView specification39 in stock, ready for shipping today.
Add 4 more and save 25.0%.
8mm ID x 2.5mm C/S (13mm OD) FKM O Ring
£0.10 – £1.26 / each
Waseach totalView specification664 in stock, ready for shipping today.
Add 4 more and save 25.0%.
21mm ID x 2mm C/S (25mm OD) FKM O Ring
£0.08 – £1.04 / each
Waseach totalView specification320 in stock, ready for shipping today.
Add 4 more and save 25.0%.
29mm ID x 3mm C/S (35mm OD) FKM O Ring
£0.25 – £1.69 / each
Waseach totalView specification25 in stock, ready for shipping today.
Add 4 more and save 25.0%.
39.5mm ID x 3mm C/S (45.5mm OD) FKM O Ring
£0.27 – £1.80 / each
Waseach totalView specification68 in stock, ready for shipping today.
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45mm ID x 4mm C/S (53mm OD) FKM O Ring
£0.34 – £2.25 / each
Waseach totalView specification194 in stock, ready for shipping today.
Add 4 more and save 25.0%.
14mm ID x 3.5mm C/S (21mm OD) FKM O Ring
£0.15 – £1.50 / each
Waseach totalView specification430 in stock, ready for shipping today.
Add 4 more and save 25.0%.
25mm ID x 2mm C/S (29mm OD) FKM O Ring
£0.10 – £1.20 / each
Waseach totalView specification386 in stock, ready for shipping today.
Add 4 more and save 25.0%.
70mm ID x 3.5mm C/S (77mm OD) FKM O Ring
£1.22 – £6.08 / each
Waseach totalView specification100 in stock, ready for shipping today.
Add 4 more and save 20.0%.
48mm ID x 3mm C/S (54mm OD) FKM O Ring
£0.81 – £4.05 / each
Waseach totalView specification146 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
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