FFKM O-rings EN7LT

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
Placeholder O-ring Black4.95 mm  x 0.64 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 222x6 Kalrez-FFKM - 75 Shore A - Black - SES-776637 O-ring Black223 mm  x 6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 19.2x2.4 Kalrez-FFKM - 75 Shore A - Black - SES-619484 O-ring Black19.3 mm  x 2.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black95 mm  x 5.3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 359x4 Kalrez-FFKM - 75 Shore A - Black - SES-627877 O-ring Black359 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black47.5 mm  x 4.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 490x16 Kalrez-FFKM - 75 Shore A - Black - SES-778504 O-ring Black491 mm  x 16 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 23x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-619868 O-ring Black23 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 109x2 Kalrez-FFKM - 75 Shore A - Black - SES-624036 O-ring Black109 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 400x10 Kalrez-FFKM - 75 Shore A - Black - SES-628253 O-ring Black401 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 63.8x3 Kalrez-FFKM - 75 Shore A - Black - SES-774650 O-ring Black63.9 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 31.8x1.5 Kalrez-FFKM - 75 Shore A - Black - SES-620660 O-ring Black31.9 mm  x 1.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 139x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-624831 O-ring Black139 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 520x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-629050 O-ring Black520 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 109.98x6.99 Kalrez-FFKM - 75 Shore A - Black - SES-775451 O-ring Black109.99 mm  x 6.99 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 32.2x2.4 Kalrez-FFKM - 75 Shore A - Black - SES-620705 O-ring Black32.3 mm  x 2.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 143x3.97 Kalrez-FFKM - 75 Shore A - Black - SES-624945 O-ring Black143 mm  x 3.97 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 529x3 Kalrez-FFKM - 75 Shore A - Black - SES-629096 O-ring Black530 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 116x7.5 Kalrez-FFKM - 75 Shore A - Black - SES-775563 O-ring Black116 mm  x 7.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 17x1.3 Kalrez-FFKM - 75 Shore A - Black - SES-619216 O-ring Black17 mm  x 1.3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black86.93 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 330x10 Kalrez-FFKM - 75 Shore A - Black - SES-627614 O-ring Black330 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 38x12 Kalrez-FFKM - 75 Shore A - Black - SES-773974 O-ring Black38 mm  x 12 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 457x8.4 Kalrez-FFKM - 75 Shore A - Black - SES-778253 O-ring Black458 mm  x 8.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 25.9x3 Kalrez-FFKM - 75 Shore A - Black - SES-620178 O-ring Black25.10 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black120 mm  x 1.9 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 443.66x7 Kalrez-FFKM - 75 Shore A - Black - SES-628574 O-ring Black443.67 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black81.5 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 39.5x1.9 Kalrez-FFKM - 75 Shore A - Black - SES-621238 O-ring Black39.6 mm  x 1.9 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 169.5x3 Kalrez-FFKM - 75 Shore A - Black - SES-625475 O-ring Black169.6 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 25x4.3 Kalrez-FFKM - 75 Shore A - Black - SES-773516 O-ring Black25 mm  x 4.3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 393x8 Kalrez-FFKM - 75 Shore A - Black - SES-777819 O-ring Black393 mm  x 8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 29.87x1.52 Kalrez-FFKM - 75 Shore A - Black - SES-620515 O-ring Black29.88 mm  x 1.52 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 135x4.5 Kalrez-FFKM - 75 Shore A - Black - SES-624758 O-ring Black135 mm  x 4.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 499.2x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-628917 O-ring Black499.3 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black105.9 mm  x 3.75 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 26.3x4.6 Kalrez-FFKM - 75 Shore A - Black - SES-620210 O-ring Black26.4 mm  x 4.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 120.4x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-624386 O-ring Black120.5 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 449x10 Kalrez-FFKM - 75 Shore A - Black - SES-628611 O-ring Black450 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 83.5x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-775016 O-ring Black83.6 mm  x 1.78 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.