FFKM O-rings EN7LT

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 128.59x4.8 Kalrez-FFKM - 75 Shore A - Black - SES-624585 O-ring Black128.60 mm  x 4.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 468.76x6.99 Kalrez-FFKM - 75 Shore A - Black - SES-628725 O-ring Black468.77 mm  x 6.99 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 88.9x9.53 Kalrez-FFKM - 75 Shore A - Black - SES-775113 O-ring Black88.10 mm  x 9.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 15.8x3.1 Kalrez-FFKM - 75 Shore A - Black - SES-619106 O-ring Black15.8 mm  x 3.1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 83.19x3.1 Kalrez-FFKM - 75 Shore A - Black - SES-623270 O-ring Black83.20 mm  x 3.1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 319x5 Kalrez-FFKM - 75 Shore A - Black - SES-627483 O-ring Black319 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 33.21x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-773822 O-ring Black33.22 mm  x 3.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 431.8x9.53 Kalrez-FFKM - 75 Shore A - Black - SES-778095 O-ring Black431.9 mm  x 9.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 10x1.9 Kalrez-FFKM - 75 Shore A - Black - SES-618373 O-ring Black10 mm  x 1.9 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 64x1.6 Kalrez-FFKM - 75 Shore A - Black - SES-622539 O-ring Black64 mm  x 1.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black256 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 563x5 Kalrez-FFKM - 75 Shore A - Black - SES-629256 O-ring Black564 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 127.7x1.5 Kalrez-FFKM - 75 Shore A - Black - SES-775716 O-ring Black127.8 mm  x 1.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 127.54x6.99 Kalrez-FFKM - 75 Shore A - Black - SES-624560 O-ring Black127.55 mm  x 6.99 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 475x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-628770 O-ring Black476 mm  x 3.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 92x2.49 Kalrez-FFKM - 75 Shore A - Black - SES-775163 O-ring Black92 mm  x 2.49 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 10x3 Kalrez-FFKM - 75 Shore A - Black - SES-618384 O-ring Black10 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 6.5x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-617888 O-ring Black6.5 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 55x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-622122 O-ring Black55 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 221x2 Kalrez-FFKM - 75 Shore A - Black - SES-626274 O-ring Black221 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black8.8 mm  x 1.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black256.6 mm  x 8.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 13.25x1.2 Kalrez-FFKM - 75 Shore A - Black - SES-618798 O-ring Black13.25 mm  x 1.2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 74.6x1 Kalrez-FFKM - 75 Shore A - Black - SES-622965 O-ring Black74.7 mm  x 1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 291.46x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-627182 O-ring Black291.47 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 675x4 Kalrez-FFKM - 75 Shore A - Black - SES-629567 O-ring Black676 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 153.5x6.8 Kalrez-FFKM - 75 Shore A - Black - SES-776028 O-ring Black153.6 mm  x 6.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 16.81x2.62 Kalrez-FFKM - 75 Shore A - Black - SES-619205 O-ring Black16.82 mm  x 2.62 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 42.4x4.06 Kalrez-FFKM - 75 Shore A - Black - SES-621419 O-ring Black42.5 mm  x 4.06 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 180x2 Kalrez-FFKM - 75 Shore A - Black - SES-625642 O-ring Black181 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 36.5x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-686740 O-ring Black36.6 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 175x9.5 Kalrez-FFKM - 75 Shore A - Black - SES-776248 O-ring Black175 mm  x 9.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 10.69x1.68 Kalrez-FFKM - 75 Shore A - Black - SES-618458 O-ring Black10.70 mm  x 1.68 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 66x2.2 Kalrez-FFKM - 75 Shore A - Black - SES-622629 O-ring Black66 mm  x 2.2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black265 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black587 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 137x1.02 Kalrez-FFKM - 75 Shore A - Black - SES-775823 O-ring Black137 mm  x 1.02 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 4.52x1.47 Kalrez-FFKM - 75 Shore A - Black - SES-617630 O-ring Black4.52 mm  x 1.47 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 49x1.5 Kalrez-FFKM - 75 Shore A - Black - SES-621803 O-ring Black49 mm  x 1.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 204.4x3.1 Kalrez-FFKM - 75 Shore A - Black - SES-626026 O-ring Black204.5 mm  x 3.1 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.