FFKM O-rings EN896

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To provide even greater thermal stability and solvent resistance, tetrafluoroethylene (TFE) containing fluoroelastomer terpolymers were introduced in 1959. The latest FKM polymers have a much broader fluids resistance profile than standard fluoroelastomers, and are able to withstand strong bases and ketones as well as aromatic hydrocarbons, oils, acids, and steam. In 1975 a new fluoroelastomer family was introduced by Asahi Glass Co., FEPM, based on an alternating copolymer of TFE and propylene. It is marketed under the trade name AFLAS®.

The chemical resistance and high-temperature stability is due to the bulkiness of the fluorine atoms, shielding the polymer backbone and carbon-fluor bond from attack, and the high bonding energy of the carbon-fluor bond.

FFKM gives the indication for the types of improved properties for different applications.


Material: Fluorocarbon elastomers
Fluorocarbon rubber is an elastomer

Fluorocarbon elastomers are highly fluorinated carbon-based polymers that are used in applications that must withstand aggressive chemical and ozone attacks.

In general, with increasing fluorine content, the resistance to chemical attack is improved, while the low temperature properties decrease. However, there are special quality fluorocarbons that do have a high fluorine content at low temperature properties.

Good qualities:

  • Chemical compatibility
  • Good temperature resistance
  • Low compression setting
  • Resistant to minerals, oils and fats
  • Good gas tightness
  • Excellent resistance to non-polar media
  • Excellent weather and aging stability
  • Very good oxygen and ozone stability
  • Operating temperature range from -26 °C to +205/230 °C (-15 °F to +400/440 °F)
  • When used briefly, the material can tolerate even higher temperatures
  • Special compounds with improved chemical resistance are available
  • Brake fluids based on glycol
  • Low molecular weight organic acids

FFKM
FFKM are perfluoroelastomeric compounds that contain an even greater amount of fluorine than FKMO fluoroelastomers.

FFKM have an improved resistance to high temperatures and chemicals and are even resistant to environments where oxygen plasma is present for many hours. Certain grades have a maximum continuous service temperature of 327 °C / 621 °F. They are often used to make o-rings and gaskets that are used to make o-rings and gaskets that are used in applications where contact with hydrocarbons or highly corrosive liquids the case, or when a wide temperature range is encountered.

On this page we offer our range of N896 certified O-Rings. Search for your specific O-ring by using the filters on the left of the page or take your time and browse our wide range of our products. When you can not find the product you are looking for in our N896 certified made from FFKM, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.

19115 products
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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 39.69x2.38 Kalrez-FFKM - 75 Shore A - Black - SES-562031 O-ring Black39.69 mm x 2.38 mmFFKM - FFPM75 Shore ANee58 icon
O-Ring 30.3x2.4 Kalrez-FFKM - 75 Shore A - Black - SES-561709 O-ring Black30.3 mm x 2.4 mmFFKM - FFPM75 Shore ANee57 icon
O-Ring 400x6 Kalrez-FFKM - 75 Shore A - Black - SES-565884 O-ring Black400 mm x 6 mmFFKM - FFPM75 Shore ANee58 icon
O-Ring 12.5x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-560852 O-ring Black12.5 mm x 3.5 mmFFKM - FFPM75 Shore ANee59 icon
O-Ring 240.97x2.62 Kalrez-FFKM - 75 Shore A - Black - SES-564981 O-ring Black240.97 mm x 2.62 mmFFKM - FFPM75 Shore ANee55 icon
O-Ring 64x4.5 Kalrez-FFKM - 75 Shore A - Black - SES-575626 O-ring Black64 mm x 4.5 mmFFKM - FFPM75 Shore ANee57 icon
O-Ring 5.94x1.35 Kalrez-FFKM - 75 Shore A - Black - SES-726099 O-ring Black5.94 mm x 1.35 mmFFKM - FFPM75 Shore ANee60 icon
O-Ring 60x1 Kalrez-FFKM - 75 Shore A - Black - SES-562658 O-ring Black60 mm x 1 mmFFKM - FFPM75 Shore ANee58 icon
O-Ring 6.8x2.62 Kalrez-FFKM - 75 Shore A - Black - SES-573261 O-ring Black6.8 mm x 2.62 mmFFKM - FFPM75 Shore ANee60 icon
O-Ring 234x3 Kalrez-FFKM - 75 Shore A - Black - SES-577372 O-ring Black234 mm x 3 mmFFKM - FFPM75 Shore ANee52 icon
O-Ring 41.02x2.16 Kalrez-FFKM - 75 Shore A - Black - SES-727781 O-ring Black41.02 mm x 2.16 mmFFKM - FFPM75 Shore ANee53 icon
O-Ring 5.08x1.02 Kalrez-FFKM - 75 Shore A - Black - SES-560421 O-ring Black5.08 mm x 1.02 mmFFKM - FFPM75 Shore ANee56 icon
O-Ring 186x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-564556 O-ring Black186 mm x 3.5 mmFFKM - FFPM75 Shore ANee57 icon
O-Ring 45.6x1.2 Kalrez-FFKM - 75 Shore A - Black - SES-575209 O-ring Black45.6 mm x 1.2 mmFFKM - FFPM75 Shore ANee50 icon
O-Ring 977.7x10.82 Kalrez-FFKM - 75 Shore A - Black - SES-579256 O-ring Black977.7 mm x 10.82 mmFFKM - FFPM75 Shore ANee56 icon
O-Ring 152.7x1.7 Kalrez-FFKM - 75 Shore A - Black - SES-729721 O-ring Black152.7 mm x 1.7 mmFFKM - FFPM75 Shore ANee59 icon
O-Ring 13.2x1.8 Kalrez-FFKM - 75 Shore A - Black - SES-560887 O-ring Black13.2 mm x 1.8 mmFFKM - FFPM75 Shore ANee52 icon
O-Ring 248x3 Kalrez-FFKM - 75 Shore A - Black - SES-565019 O-ring Black248 mm x 3 mmFFKM - FFPM75 Shore ANee51 icon
O-Ring 66.04x7.87 Kalrez-FFKM - 75 Shore A - Black - SES-575668 O-ring Black66.04 mm x 7.87 mmFFKM - FFPM75 Shore ANee50 icon
O-Ring 5.5x0.55 Kalrez-FFKM - 75 Shore A - Black - SES-726065 O-ring Black5.5 mm x 0.55 mmFFKM - FFPM75 Shore ANee53 icon
O-Ring 201x12 Kalrez-FFKM - 75 Shore A - Black - SES-730180 O-ring Black201 mm x 12 mmFFKM - FFPM75 Shore ANee59 icon
O-Ring 88x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-563255 O-ring Black88 mm x 3.5 mmFFKM - FFPM75 Shore ANee60 icon
O-Ring 16.08x2.59 Kalrez-FFKM - 75 Shore A - Black - SES-573930 O-ring Black16.08 mm x 2.59 mmFFKM - FFPM75 Shore ANee59 icon
O-Ring 347x6 Kalrez-FFKM - 75 Shore A - Black - SES-577970 O-ring Black347 mm x 6 mmFFKM - FFPM75 Shore ANee52 icon
O-Ring 69.5x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-728447 O-ring Black69.5 mm x 2.5 mmFFKM - FFPM75 Shore ANee59 icon
O-Ring 94.1x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-563380 O-ring Black94.1 mm x 5.7 mmFFKM - FFPM75 Shore ANee59 icon
O-Ring 18.54x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-574055 O-ring Black18.54 mm x 1.78 mmFFKM - FFPM75 Shore ANee53 icon
O-Ring 375x5 Kalrez-FFKM - 75 Shore A - Black - SES-578096 O-ring Black375 mm x 5 mmFFKM - FFPM75 Shore ANee58 icon
O-Ring 76.5x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-728574 O-ring Black76.5 mm x 2.5 mmFFKM - FFPM75 Shore ANee57 icon
O-Ring 14.12x2.39 Kalrez-FFKM - 75 Shore A - Black - SES-573817 O-ring Black14.12 mm x 2.39 mmFFKM - FFPM75 Shore ANee58 icon
O-Ring 324x5.34 Kalrez-FFKM - 75 Shore A - Black - SES-577859 O-ring Black324 mm x 5.34 mmFFKM - FFPM75 Shore ANee60 icon
O-Ring 63.5x1.5 Kalrez-FFKM - 75 Shore A - Black - SES-728338 O-ring Black63.5 mm x 1.5 mmFFKM - FFPM75 Shore ANee54 icon
O-Ring 22x5.5 Kalrez-FFKM - 75 Shore A - Black - SES-727077 O-ring Black22 mm x 5.5 mmFFKM - FFPM75 Shore ANee50 icon
O-Ring 342.9x6.35 Kalrez-FFKM - 75 Shore A - Black - SES-731194 O-ring Black342.9 mm x 6.35 mmFFKM - FFPM75 Shore ANee55 icon
O-Ring 205x20 Kalrez-FFKM - 75 Shore A - Black - SES-730219 O-ring Black205 mm x 20 mmFFKM - FFPM75 Shore ANee51 icon
O-Ring 355x4 Kalrez-FFKM - 75 Shore A - Black - SES-565682 O-ring Black355 mm x 4 mmFFKM - FFPM75 Shore ANee57 icon
O-Ring 93.26x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-563368 O-ring Black93.26 mm x 3.53 mmFFKM - FFPM75 Shore ANee60 icon
O-Ring 18.42x2.92 Kalrez-FFKM - 75 Shore A - Black - SES-574045 O-ring Black18.42 mm x 2.92 mmFFKM - FFPM75 Shore ANee59 icon
O-Ring 374x4 Kalrez-FFKM - 75 Shore A - Black - SES-578088 O-ring Black374 mm x 4 mmFFKM - FFPM75 Shore ANee55 icon
O-Ring 76.2x6.6 Kalrez-FFKM - 75 Shore A - Black - SES-728569 O-ring Black76.2 mm x 6.6 mmFFKM - FFPM75 Shore ANee50 icon