FFKM O-rings EN7LT

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 25x1.8 Kalrez-FFKM - 75 Shore A - Black - SES-620076 O-ring Black25 mm  x 1.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 117.35x3.1 Kalrez-FFKM - 75 Shore A - Black - SES-624291 O-ring Black117.36 mm  x 3.1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black440.70 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 17x8 Kalrez-FFKM - 75 Shore A - Black - SES-773137 O-ring Black17 mm  x 8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 342.3x12.5 Kalrez-FFKM - 75 Shore A - Black - SES-777493 O-ring Black342.4 mm  x 12.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 21.65x3.65 Kalrez-FFKM - 75 Shore A - Black - SES-619739 O-ring Black21.66 mm  x 3.65 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 105.7x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-623956 O-ring Black105.8 mm  x 3.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 397x10 Kalrez-FFKM - 75 Shore A - Black - SES-628221 O-ring Black397 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 83.5x1.2 Kalrez-FFKM - 75 Shore A - Black - SES-775014 O-ring Black83.6 mm  x 1.2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 15x1 Kalrez-FFKM - 75 Shore A - Black - SES-618988 O-ring Black15 mm  x 1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 81.9x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-623209 O-ring Black81.10 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black319 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 35.15x0.75 Kalrez-FFKM - 75 Shore A - Black - SES-773878 O-ring Black35.16 mm  x 0.75 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 450x5.5 Kalrez-FFKM - 75 Shore A - Black - SES-778204 O-ring Black451 mm  x 5.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 13.9x2 Kalrez-FFKM - 75 Shore A - Black - SES-618872 O-ring Black13.10 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 78.6x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-623095 O-ring Black78.7 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 308x4 Kalrez-FFKM - 75 Shore A - Black - SES-627367 O-ring Black308 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black31.75 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 431.5x6 Kalrez-FFKM - 75 Shore A - Black - SES-778093 O-ring Black431.6 mm  x 6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 19.5x3 Kalrez-FFKM - 75 Shore A - Black - SES-619513 O-ring Black19.5 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 98.02x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-623739 O-ring Black98.03 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black375 mm  x 3.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 56x1.6 Kalrez-FFKM - 75 Shore A - Black - SES-774437 O-ring Black56 mm  x 1.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 5.8x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-617791 O-ring Black5.8 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 54x6 Kalrez-FFKM - 75 Shore A - Black - SES-622083 O-ring Black54 mm  x 6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 222x2.62 Kalrez-FFKM - 75 Shore A - Black - SES-626294 O-ring Black223 mm  x 2.62 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 276x10 Kalrez-FFKM - 75 Shore A - Black - SES-777020 O-ring Black276 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 24.38x2.69 Kalrez-FFKM - 75 Shore A - Black - SES-620008 O-ring Black24.39 mm  x 2.69 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black115 mm  x 1.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 432.2x2.62 Kalrez-FFKM - 75 Shore A - Black - SES-628499 O-ring Black432.3 mm  x 2.62 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black79.6 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 23x5 Kalrez-FFKM - 75 Shore A - Black - SES-619883 O-ring Black23 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 110.8x4 Kalrez-FFKM - 75 Shore A - Black - SES-624104 O-ring Black110.9 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 417.96x7 Kalrez-FFKM - 75 Shore A - Black - SES-628374 O-ring Black417.97 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 93x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-775175 O-ring Black93 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 34x3.6 Kalrez-FFKM - 75 Shore A - Black - SES-620838 O-ring Black34 mm  x 3.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 148.5x2 Kalrez-FFKM - 75 Shore A - Black - SES-625060 O-ring Black148.6 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 582x3 Kalrez-FFKM - 75 Shore A - Black - SES-629329 O-ring Black582 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 133x6 Kalrez-FFKM - 75 Shore A - Black - SES-775779 O-ring Black133 mm  x 6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 3.43x0.6 Kalrez-FFKM - 75 Shore A - Black - SES-617483 O-ring Black3.43 mm  x 0.6 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.