FFKM O-rings EN9LT

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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 N9LT 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 N9LT certified made from FFKM, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.

19073 products
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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 75.82x3.53 Kalrez-FFKM - 90 Shore A - Black - SES-545334 O-ring Black75.82 x 3.53FFKM - FFPM90 Shore AJa52 icon
O-Ring 13.8x3.9 Kalrez-FFKM - 90 Shore A - Black - SES-580217 O-ring Black13.8 x 3.9FFKM - FFPM90 Shore AJa50 icon
O-Ring 335x8.5 Kalrez-FFKM - 90 Shore A - Black - SES-584325 O-ring Black335 x 8.5FFKM - FFPM90 Shore AJa50 icon
O-Ring 62.5x1.8 Kalrez-FFKM - 90 Shore A - Black - SES-741549 O-ring Black62.5 x 1.8FFKM - FFPM90 Shore AJa60 icon
O-Ring 120x6 Kalrez-FFKM - 90 Shore A - Black - SES-546024 O-ring Black120 x 6FFKM - FFPM90 Shore AJa54 icon
O-Ring 27.43x2.49 Kalrez-FFKM - 90 Shore A - Black - SES-580973 O-ring Black27.43 x 2.49FFKM - FFPM90 Shore AJa51 icon
O-Ring 47.5x1.8 Kalrez-FFKM - 90 Shore A - Black - SES-544654 O-ring Black47.5 x 1.8FFKM - FFPM90 Shore AJa58 icon
O-Ring 4.7x1.9 Kalrez-FFKM - 90 Shore A - Black - SES-579516 O-ring Black4.7 x 1.9FFKM - FFPM90 Shore AJa50 icon
O-Ring 213x4 Kalrez-FFKM - 90 Shore A - Black - SES-583648 O-ring Black213 x 4FFKM - FFPM90 Shore AJa53 icon
O-Ring 37.4x1.25 Kalrez-FFKM - 90 Shore A - Black - SES-740874 O-ring Black37.4 x 1.25FFKM - FFPM90 Shore AJa60 icon
O-Ring 430x17 Kalrez-FFKM - 90 Shore A - Black - SES-745014 O-ring Black430 x 17FFKM - FFPM90 Shore AJa54 icon
O-Ring 5.5x2 Kalrez-FFKM - 90 Shore A - Black - SES-542912 O-ring Black5.5 x 2FFKM - FFPM90 Shore AJa56 icon
O-Ring 206x7 Kalrez-FFKM - 90 Shore A - Black - SES-546901 O-ring Black206 x 7FFKM - FFPM90 Shore AJa53 icon
O-Ring 55x1.6 Kalrez-FFKM - 90 Shore A - Black - SES-581854 O-ring Black55 x 1.6FFKM - FFPM90 Shore AJa53 icon
O-Ring 2.65x1.6 Kalrez-FFKM - 90 Shore A - Black - SES-739056 O-ring Black2.65 x 1.6FFKM - FFPM90 Shore AJa59 icon
O-Ring 180x4.3 Kalrez-FFKM - 90 Shore A - Black - SES-743228 O-ring Black180 x 4.3FFKM - FFPM90 Shore AJa50 icon
O-Ring 45x7 Kalrez-FFKM - 90 Shore A - Black - SES-544591 O-ring Black45 x 7FFKM - FFPM90 Shore AJa57 icon
O-Ring 3.75x1.3 Kalrez-FFKM - 90 Shore A - Black - SES-579451 O-ring Black3.75 x 1.3FFKM - FFPM90 Shore AJa55 icon
O-Ring 205x10 Kalrez-FFKM - 90 Shore A - Black - SES-583589 O-ring Black205 x 10FFKM - FFPM90 Shore AJa51 icon
O-Ring 35.5x4 Kalrez-FFKM - 90 Shore A - Black - SES-740817 O-ring Black35.5 x 4FFKM - FFPM90 Shore AJa52 icon
O-Ring 421x9 Kalrez-FFKM - 90 Shore A - Black - SES-744959 O-ring Black421 x 9FFKM - FFPM90 Shore AJa57 icon
O-Ring 5.23x2.62 Kalrez-FFKM - 90 Shore A - Black - SES-541261 O-ring Black5.23 x 2.62FFKM - FFPM90 Shore AJa56 icon
O-Ring 148.52x3.53 Kalrez-FFKM - 90 Shore A - Black - SES-546390 O-ring Black148.52 x 3.53FFKM - FFPM90 Shore AJa50 icon
O-Ring 35.8x3.1 Kalrez-FFKM - 90 Shore A - Black - SES-581343 O-ring Black35.8 x 3.1FFKM - FFPM90 Shore AJa52 icon
O-Ring 53x1.5 Kalrez-FFKM - 90 Shore A - Black - SES-544806 O-ring Black53 x 1.5FFKM - FFPM90 Shore AJa51 icon
O-Ring 6.8x2.62 Kalrez-FFKM - 90 Shore A - Black - SES-579680 O-ring Black6.8 x 2.62FFKM - FFPM90 Shore AJa57 icon
O-Ring 237x3.5 Kalrez-FFKM - 90 Shore A - Black - SES-583808 O-ring Black237 x 3.5FFKM - FFPM90 Shore AJa59 icon
O-Ring 42x5.4 Kalrez-FFKM - 90 Shore A - Black - SES-741037 O-ring Black42 x 5.4FFKM - FFPM90 Shore AJa51 icon
O-Ring 457x8 Kalrez-FFKM - 90 Shore A - Black - SES-745180 O-ring Black457 x 8FFKM - FFPM90 Shore AJa60 icon
O-Ring 57.5x3.53 Kalrez-FFKM - 90 Shore A - Black - SES-544939 O-ring Black57.5 x 3.53FFKM - FFPM90 Shore AJa56 icon
O-Ring 9.1x1.65 Kalrez-FFKM - 90 Shore A - Black - SES-579862 O-ring Black9.1 x 1.65FFKM - FFPM90 Shore AJa56 icon
O-Ring 264x3.5 Kalrez-FFKM - 90 Shore A - Black - SES-583981 O-ring Black264 x 3.5FFKM - FFPM90 Shore AJa58 icon
O-Ring 49x0.8 Kalrez-FFKM - 90 Shore A - Black - SES-741211 O-ring Black49 x 0.8FFKM - FFPM90 Shore AJa56 icon
O-Ring 479x7 Kalrez-FFKM - 90 Shore A - Black - SES-745355 O-ring Black479 x 7FFKM - FFPM90 Shore AJa50 icon
O-Ring 18.55x1 Kalrez-FFKM - 90 Shore A - Black - SES-543643 O-ring Black18.55 x 1FFKM - FFPM90 Shore AJa50 icon
O-Ring 319x4 Kalrez-FFKM - 90 Shore A - Black - SES-547623 O-ring Black319 x 4FFKM - FFPM90 Shore AJa54 icon
O-Ring 101.5x2 Kalrez-FFKM - 90 Shore A - Black - SES-582582 O-ring Black101.5 x 2FFKM - FFPM90 Shore AJa52 icon
O-Ring 12.45x1.04 Kalrez-FFKM - 90 Shore A - Black - SES-739795 O-ring Black12.45 x 1.04FFKM - FFPM90 Shore AJa60 icon
O-Ring 279x2.5 Kalrez-FFKM - 90 Shore A - Black - SES-743968 O-ring Black279 x 2.5FFKM - FFPM90 Shore AJa55 icon
O-Ring 85x3.55 Kalrez-FFKM - 90 Shore A - Black - SES-545504 O-ring Black85 x 3.55FFKM - FFPM90 Shore AJa56 icon