16mm ID x 4mm C/S (24mm OD) FKM O Ring
£0.24 – £1.58 / each
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each
total
27 in stock, ready for shipping today.
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FKM (Fluoroelastomer / Viton®) O Rings
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36mm ID x 2mm C/S (40mm OD) FKM O Ring
£0.15 – £1.51 / each
Waseach totalView specification393 in stock, ready for shipping today.
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BS142 FKM O Ring - 59.99mm ID x 2.62mm C/S (65.23mm OD)
£0.30 – £2.00 / each
Waseach totalView specification57 in stock, ready for shipping today.
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15mm ID x 4mm C/S (23mm OD) FKM O Ring
£0.35 – £1.95 / each
Waseach totalView specification71 in stock, ready for shipping today.
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34.5mm ID x 3mm C/S (40.5mm OD) FKM O Ring
£0.30 – £2.00 / each
Waseach totalView specification91 in stock, ready for shipping today.
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BS223 FKM O Ring - 40.87mm ID x 3.53mm C/S (47.93mm OD)
£0.25 – £1.95 / each
Waseach totalView specification31 in stock, ready for shipping today.
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15.6mm ID x 2.4mm C/S (20.4mm OD) FKM O Ring
£0.08 – £1.00 / each
Waseach totalView specification48 in stock, ready for shipping today.
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75mm ID x 3mm C/S (81mm OD) FKM O Ring
£0.35 – £1.92 / each
Waseach totalView specificationOut of stock.
24mm ID x 4mm C/S (32mm OD) FKM O Ring
£0.24 – £1.60 / each
Waseach totalView specification4 in stock, ready for shipping today.
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32mm ID x 4mm C/S (40mm OD) FKM O Ring
£0.50 – £2.78 / each
Waseach totalView specification32 in stock, ready for shipping today.
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29mm ID x 2mm C/S (33mm OD) FKM O Ring
£0.10 – £1.20 / each
Waseach totalView specification479 in stock, ready for shipping today.
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24mm ID x 2mm C/S (28mm OD) FKM O Ring
£0.10 – £1.20 / each
Waseach totalView specification434 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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