FFKM O-rings EN7LT

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
Placeholder O-ring Black184.4 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 1.8x0.61 Kalrez-FFKM - 75 Shore A - Black - SES-772046 O-ring Black1.8 mm  x 0.61 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black177.9 mm  x 6.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 24.6x1.8 Kalrez-FFKM - 75 Shore A - Black - SES-620033 O-ring Black24.7 mm  x 1.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 113.67x4.47 Kalrez-FFKM - 75 Shore A - Black - SES-624176 O-ring Black113.68 mm  x 4.47 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 417x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-628366 O-ring Black417 mm  x 3.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 69x5.5 Kalrez-FFKM - 75 Shore A - Black - SES-774740 O-ring Black69 mm  x 5.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 6.75x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-617915 O-ring Black6.75 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 53.72x1.19 Kalrez-FFKM - 75 Shore A - Black - SES-622061 O-ring Black53.73 mm  x 1.19 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 220x2 Kalrez-FFKM - 75 Shore A - Black - SES-626261 O-ring Black221 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 7.4x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-772530 O-ring Black7.4 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 249x8 Kalrez-FFKM - 75 Shore A - Black - SES-776832 O-ring Black249 mm  x 8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 14.48x2.69 Kalrez-FFKM - 75 Shore A - Black - SES-618944 O-ring Black14.49 mm  x 2.69 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 78.5x3 Kalrez-FFKM - 75 Shore A - Black - SES-623091 O-ring Black78.6 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black300 mm  x 6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 27.38x0.76 Kalrez-FFKM - 75 Shore A - Black - SES-773601 O-ring Black27.39 mm  x 0.76 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 400x4.5 Kalrez-FFKM - 75 Shore A - Black - SES-777868 O-ring Black401 mm  x 4.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 17.93x1.8 Kalrez-FFKM - 75 Shore A - Black - SES-619332 O-ring Black17.94 mm  x 1.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 89.4x2 Kalrez-FFKM - 75 Shore A - Black - SES-623479 O-ring Black89.5 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 339.2x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-627679 O-ring Black339.3 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 39.25x1.25 Kalrez-FFKM - 75 Shore A - Black - SES-774011 O-ring Black39.26 mm  x 1.25 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 458x5 Kalrez-FFKM - 75 Shore A - Black - SES-778263 O-ring Black459 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black19 mm  x 9 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 345x9.5 Kalrez-FFKM - 75 Shore A - Black - SES-777516 O-ring Black346 mm  x 9.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 22.2x2.4 Kalrez-FFKM - 75 Shore A - Black - SES-619800 O-ring Black22.3 mm  x 2.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 105.2x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-623945 O-ring Black105.3 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 388.72x6.99 Kalrez-FFKM - 75 Shore A - Black - SES-628143 O-ring Black388.73 mm  x 6.99 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 9.4x1 Kalrez-FFKM - 75 Shore A - Black - SES-618293 O-ring Black9.4 mm  x 1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 61.83x2.36 Kalrez-FFKM - 75 Shore A - Black - SES-622445 O-ring Black61.84 mm  x 2.36 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 248.5x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-626645 O-ring Black248.6 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black13.70 mm  x 0.66 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 305x7.25 Kalrez-FFKM - 75 Shore A - Black - SES-777229 O-ring Black306 mm  x 7.25 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black36 mm  x 4.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 155x3.1 Kalrez-FFKM - 75 Shore A - Black - SES-625200 O-ring Black155 mm  x 3.1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 582x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-629333 O-ring Black582 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 133x8 Kalrez-FFKM - 75 Shore A - Black - SES-775780 O-ring Black133 mm  x 8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 36.2x1.5 Kalrez-FFKM - 75 Shore A - Black - SES-621003 O-ring Black36.3 mm  x 1.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 155.6x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-625219 O-ring Black155.7 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 584x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-629351 O-ring Black584 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 134x8.5 Kalrez-FFKM - 75 Shore A - Black - SES-775799 O-ring Black134 mm  x 8.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon

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 N7LT 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 N7LT  certified made from FFKM, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.