61mm ID x 2.5mm C/S (66mm OD) FKM O Ring
£0.62 – £3.45 / each
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each
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64 in stock, ready for shipping today.
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FKM (Fluoroelastomer / Viton®) O Rings
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3mm ID x 1mm C/S (5mm OD) FKM O Ring
£0.02 – £0.75 / each
Waseach totalView specification112 in stock, ready for shipping today.
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BS012 FKM O Ring - 9.25mm ID x 1.78mm C/S (12.81mm OD)
£0.04 – £0.63 / each
Waseach totalView specification716 in stock, ready for shipping today.
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262mm ID x 4mm C/S (270mm OD) FKM O Ring
£3.78 – £10.80 / each
Waseach totalView specification103 in stock, ready for shipping today.
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67.6mm ID x 2.4mm C/S (72.4mm OD) FKM O Ring
£0.90 – £4.50 / each
Waseach totalView specification3 in stock, ready for shipping today.
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13mm ID x 2.5mm C/S (18mm OD) FKM O Ring
£0.10 – £1.20 / each
Waseach totalView specification346 in stock, ready for shipping today.
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19mm ID x 2.5mm C/S (24mm OD) FKM O Ring
£0.12 – £1.23 / each
Waseach totalView specification306 in stock, ready for shipping today.
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BS019 FKM O Ring - 20.35mm ID x 1.78mm C/S (23.91mm OD)
£0.10 – £1.20 / each
Waseach totalView specification500 in stock, ready for shipping today.
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44mm ID x 2mm C/S (48mm OD) FKM O Ring
£0.27 – £2.10 / each
Waseach totalView specification200 in stock, ready for shipping today.
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BS041 FKM O Ring - 75.92mm ID x 1.78mm C/S (79.48mm OD)
£0.77 – £3.83 / each
Waseach totalView specification49 in stock, ready for shipping today.
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38mm ID x 2mm C/S (42mm OD) FKM O Ring
£0.47 – £2.63 / each
Waseach totalView specification40 in stock, ready for shipping today.
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310mm ID x 2.5mm C/S (315mm OD) FKM O Ring
£1.92 – £9.60 / each
Waseach totalView specification135 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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