34mm ID x 3.5mm C/S (41mm OD) FKM O Ring
£0.38 – £2.12 / each
Was
each
total
194 in stock, ready for shipping today.
Add 4 more and save 20.0%.
FKM (Fluoroelastomer / Viton®) O Rings
376 products
- View specification
16mm ID x 2.5mm C/S (21mm OD) FKM O Ring
£0.08 – £1.02 / each
Waseach totalView specification294 in stock, ready for shipping today.
Add 4 more and save 25.0%.
50mm ID x 4mm C/S (58mm OD) FKM O Ring
£0.39 – £2.14 / each
Waseach totalView specification86 in stock, ready for shipping today.
Add 4 more and save 20.0%.
24.2mm ID x 3mm C/S (30.2mm OD) FKM O Ring
£0.27 – £2.10 / each
Waseach totalView specification13 in stock, ready for shipping today.
Add 4 more and save 25.0%.
7mm ID x 3mm C/S (13mm OD) FKM O Ring
£0.24 – £1.60 / each
Waseach totalView specification20 in stock, ready for shipping today.
Add 4 more and save 25.0%.
122mm ID x 3mm C/S (128mm OD) FKM O Ring
£1.25 – £6.25 / each
Waseach totalView specification7 in stock, ready for shipping today.
Add 4 more and save 20.0%.
4mm ID x 3mm C/S (10mm OD) FKM O Ring
£0.09 – £1.09 / each
Waseach totalView specification329 in stock, ready for shipping today.
Add 4 more and save 25.0%.
78mm ID x 2mm C/S (82mm OD) FKM O Ring
£0.35 – £2.30 / each
Waseach totalView specification89 in stock, ready for shipping today.
Add 4 more and save 25.0%.
285mm ID x 4mm C/S (293mm OD) FKM O Ring
£4.37 – £12.48 / each
Waseach totalView specification7 in stock, ready for shipping today.
Add 4 more and save 17.0%.
82mm ID x 5mm C/S (92mm OD) FKM O Ring
£1.46 – £7.30 / each
Waseach totalView specification6 in stock, ready for shipping today.
Add 4 more and save 20.0%.
62mm ID x 5mm C/S (72mm OD) FKM O Ring
£1.60 – £8.00 / each
Waseach totalView specification1 in stock, ready for shipping today.
Add 4 more and save 20.0%.
33mm ID x 4mm C/S (41mm OD) FKM O Ring
£0.24 – £1.58 / each
Waseach totalView specification189 in stock, ready for shipping today.
Add 4 more and save 25.0%.
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:
-
Temperatures from –20 °C up to +200 °C (with peaks of 230 °C in some compounds)
-
Chemicals like fuels, oils, acids, and solvents
-
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
-
Fuel injectors & turbo kits
-
Industrial pumps and valves
-
High-performance engines
-
Chemical sealing and lab equipment
Contact us
Here to help
Got a question we haven’t answered yet? Ask our team. We reply within a day, and good questions become new articles for everyone.