FFKM O-rings EN7LT

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 220x7.5 Kalrez-FFKM - 75 Shore A - Black - SES-776627 O-ring Black221 mm  x 7.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 95x4.75 Kalrez-FFKM - 75 Shore A - Black - SES-775216 O-ring Black95 mm  x 4.75 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 13x1.75 Kalrez-FFKM - 75 Shore A - Black - SES-618757 O-ring Black13 mm  x 1.75 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 72.2x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-622873 O-ring Black72.3 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 279.3x2.62 Kalrez-FFKM - 75 Shore A - Black - SES-627041 O-ring Black279.4 mm  x 2.62 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black20.84 mm  x 4.24 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 353.37x7 Kalrez-FFKM - 75 Shore A - Black - SES-777568 O-ring Black353.38 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black19.8 mm  x 1.98 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 95x7 Kalrez-FFKM - 75 Shore A - Black - SES-623656 O-ring Black95 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 42.9x4.82 Kalrez-FFKM - 75 Shore A - Black - SES-774146 O-ring Black42.10 mm  x 4.82 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 462x5 Kalrez-FFKM - 75 Shore A - Black - SES-778292 O-ring Black462 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 1.8x1.5 Kalrez-FFKM - 75 Shore A - Black - SES-617311 O-ring Black1.8 mm  x 1.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 44x2.6 Kalrez-FFKM - 75 Shore A - Black - SES-621512 O-ring Black44 mm  x 2.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 178x6 Kalrez-FFKM - 75 Shore A - Black - SES-625619 O-ring Black179 mm  x 6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 873x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-629720 O-ring Black874 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 164x12 Kalrez-FFKM - 75 Shore A - Black - SES-776137 O-ring Black164 mm  x 12 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 89.6x3.15 Kalrez-FFKM - 75 Shore A - Black - SES-623486 O-ring Black89.7 mm  x 3.15 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 337x5 Kalrez-FFKM - 75 Shore A - Black - SES-627659 O-ring Black338 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 38x5.5 Kalrez-FFKM - 75 Shore A - Black - SES-773968 O-ring Black38 mm  x 5.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 448x5 Kalrez-FFKM - 75 Shore A - Black - SES-778193 O-ring Black449 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black2.31 mm  x 1.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 14.1x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-618919 O-ring Black14.1 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 76.99x2.45 Kalrez-FFKM - 75 Shore A - Black - SES-623038 O-ring Black76.100 mm  x 2.45 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 293.6x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-627208 O-ring Black293.7 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 24.6x3.4 Kalrez-FFKM - 75 Shore A - Black - SES-773495 O-ring Black24.7 mm  x 3.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 380x2.4 Kalrez-FFKM - 75 Shore A - Black - SES-777741 O-ring Black380 mm  x 2.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 7.1x1.35 Kalrez-FFKM - 75 Shore A - Black - SES-617959 O-ring Black7.1 mm  x 1.35 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 54x4 Kalrez-FFKM - 75 Shore A - Black - SES-622080 O-ring Black54 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 219.3x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-626256 O-ring Black219.4 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 7.2x0.98 Kalrez-FFKM - 75 Shore A - Black - SES-772509 O-ring Black7.2 mm  x 0.98 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 243x3.3 Kalrez-FFKM - 75 Shore A - Black - SES-776786 O-ring Black243 mm  x 3.3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 9.5x3 Kalrez-FFKM - 75 Shore A - Black - SES-618322 O-ring Black9.5 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 61.8x7 Kalrez-FFKM - 75 Shore A - Black - SES-622444 O-ring Black61.9 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 246x5 Kalrez-FFKM - 75 Shore A - Black - SES-626618 O-ring Black246 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 12.7x1.65 Kalrez-FFKM - 75 Shore A - Black - SES-772886 O-ring Black12.7 mm  x 1.65 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 296.57x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-777157 O-ring Black296.58 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 20.7x3.4 Kalrez-FFKM - 75 Shore A - Black - SES-619654 O-ring Black20.7 mm  x 3.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 99.7x7 Kalrez-FFKM - 75 Shore A - Black - SES-623775 O-ring Black99.8 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black48.6 mm  x 3.3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 479x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-778426 O-ring Black479 mm  x 3.5 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.