FFKM O-rings EN7LT

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 16.08x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-619152 O-ring Black16.09 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 83.5x2 Kalrez-FFKM - 75 Shore A - Black - SES-623275 O-ring Black83.6 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 315.5x7 Kalrez-FFKM - 75 Shore A - Black - SES-627450 O-ring Black315.6 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 31.5x4 Kalrez-FFKM - 75 Shore A - Black - SES-773753 O-ring Black31.5 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 415.29x6.99 Kalrez-FFKM - 75 Shore A - Black - SES-777993 O-ring Black415.30 mm  x 6.99 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 30.2x1.25 Kalrez-FFKM - 75 Shore A - Black - SES-620555 O-ring Black30.3 mm  x 1.25 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black132 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 488.32x10.82 Kalrez-FFKM - 75 Shore A - Black - SES-628856 O-ring Black488.33 mm  x 10.82 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 95x1.4 Kalrez-FFKM - 75 Shore A - Black - SES-775213 O-ring Black95 mm  x 1.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 14.48x3.06 Kalrez-FFKM - 75 Shore A - Black - SES-618945 O-ring Black14.49 mm  x 3.06 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 77.5x7 Kalrez-FFKM - 75 Shore A - Black - SES-623069 O-ring Black77.6 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 297x7 Kalrez-FFKM - 75 Shore A - Black - SES-627247 O-ring Black297 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 25.5x1.6 Kalrez-FFKM - 75 Shore A - Black - SES-773539 O-ring Black25.6 mm  x 1.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 387.35x2.62 Kalrez-FFKM - 75 Shore A - Black - SES-777793 O-ring Black387.36 mm  x 2.62 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 21.6x1.14 Kalrez-FFKM - 75 Shore A - Black - SES-619733 O-ring Black21.7 mm  x 1.14 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 103x3.1 Kalrez-FFKM - 75 Shore A - Black - SES-623857 O-ring Black103 mm  x 3.1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 52.1x6.6 Kalrez-FFKM - 75 Shore A - Black - SES-774378 O-ring Black52.2 mm  x 6.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 492.13x5.34 Kalrez-FFKM - 75 Shore A - Black - SES-778520 O-ring Black492.14 mm  x 5.34 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 20.3x3 Kalrez-FFKM - 75 Shore A - Black - SES-619619 O-ring Black20.4 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 99x1.5 Kalrez-FFKM - 75 Shore A - Black - SES-623745 O-ring Black99 mm  x 1.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 364x4 Kalrez-FFKM - 75 Shore A - Black - SES-627925 O-ring Black365 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black48 mm  x 1.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 476x10 Kalrez-FFKM - 75 Shore A - Black - SES-778409 O-ring Black477 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 4.32x1.19 Kalrez-FFKM - 75 Shore A - Black - SES-617598 O-ring Black4.32 mm  x 1.19 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 47.6x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-621727 O-ring Black47.7 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 196x6 Kalrez-FFKM - 75 Shore A - Black - SES-625909 O-ring Black196 mm  x 6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 7.32x0.95 Kalrez-FFKM - 75 Shore A - Black - SES-772518 O-ring Black7.33 mm  x 0.95 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black245 mm  x 7.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 4.5x1 Kalrez-FFKM - 75 Shore A - Black - SES-617616 O-ring Black4.5 mm  x 1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 48x1.8 Kalrez-FFKM - 75 Shore A - Black - SES-621746 O-ring Black48 mm  x 1.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 198x3.6 Kalrez-FFKM - 75 Shore A - Black - SES-625929 O-ring Black198 mm  x 3.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 7.5x1.4 Kalrez-FFKM - 75 Shore A - Black - SES-772539 O-ring Black7.5 mm  x 1.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black248.6 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 40x2 Kalrez-FFKM - 75 Shore A - Black - SES-621265 O-ring Black40 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black168.29 mm  x 4.45 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 7.1x2 Kalrez-FFKM - 75 Shore A - Black - SES-772505 O-ring Black7.1 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 244x2.65 Kalrez-FFKM - 75 Shore A - Black - SES-776794 O-ring Black245 mm  x 2.65 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 36.2x2.65 Kalrez-FFKM - 75 Shore A - Black - SES-621011 O-ring Black36.3 mm  x 2.65 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 40.6x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-621309 O-ring Black40.7 mm  x 3.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 170.4x4 Kalrez-FFKM - 75 Shore A - Black - SES-625500 O-ring Black170.5 mm  x 4 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.