FFKM O-rings EN993

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 23.1x3 Kalrez-FFKM - 90 Shore A - Black - SES-789306 O-ring Black23.1 mm x 3 mmFFKM - FFPM90 Shore ANee55 icon
O-Ring 18x0.5 Kalrez-FFKM - 90 Shore A - Black - SES-788494 O-ring Black18 mm x 0.5 mmFFKM - FFPM90 Shore ANee60 icon
O-Ring 55x2.4 Kalrez-FFKM - 90 Shore A - Black - SES-792532 O-ring Black55 mm x 2.4 mmFFKM - FFPM90 Shore ANee53 icon
O-Ring 17.4x2.8 Kalrez-FFKM - 90 Shore A - Black - SES-788414 O-ring Black17.4 mm x 2.8 mmFFKM - FFPM90 Shore ANee59 icon
Placeholder O-ring Black54.61 mm x 3.3 mmFFKM - FFPM90 Shore ANee59 icon
O-Ring 15.65x1.78 Kalrez-FFKM - 90 Shore A - Black - SES-788125 O-ring Black15.65 mm x 1.78 mmFFKM - FFPM90 Shore ANee58 icon
O-Ring 50x3.25 Kalrez-FFKM - 90 Shore A - Black - SES-792165 O-ring Black50 mm x 3.25 mmFFKM - FFPM90 Shore ANee51 icon
O-Ring 128x4 Kalrez-FFKM - 90 Shore A - Black - SES-796294 O-ring Black128 mm x 4 mmFFKM - FFPM90 Shore ANee60 icon
O-Ring 6.8x1.52 Kalrez-FFKM - 90 Shore A - Black - SES-786380 O-ring Black6.8 mm x 1.52 mmFFKM - FFPM90 Shore ANee54 icon
O-Ring 32x2.3 Kalrez-FFKM - 90 Shore A - Black - SES-790440 O-ring Black32 mm x 2.3 mmFFKM - FFPM90 Shore ANee58 icon
O-Ring 89x1.5 Kalrez-FFKM - 90 Shore A - Black - SES-794576 O-ring Black89 mm x 1.5 mmFFKM - FFPM90 Shore ANee59 icon
O-Ring 209x5.3 Kalrez-FFKM - 90 Shore A - Black - SES-798646 O-ring Black209 mm x 5.3 mmFFKM - FFPM90 Shore ANee50 icon
O-Ring 443.6x7 Kalrez-FFKM - 90 Shore A - Black - SES-802751 O-ring Black443.6 mm x 7 mmFFKM - FFPM90 Shore ANee58 icon
O-Ring 2.31x1 Kalrez-FFKM - 90 Shore A - Black - SES-785429 O-ring Black2.31 mm x 1 mmFFKM - FFPM90 Shore ANee50 icon
O-Ring 25x1.35 Kalrez-FFKM - 90 Shore A - Black - SES-789564 O-ring Black25 mm x 1.35 mmFFKM - FFPM90 Shore ANee55 icon
O-Ring 11x6 Kalrez-FFKM - 90 Shore A - Black - SES-787286 O-ring Black11 mm x 6 mmFFKM - FFPM90 Shore ANee52 icon
O-Ring 40.5x0.8 Kalrez-FFKM - 90 Shore A - Black - SES-791344 O-ring Black40.5 mm x 0.8 mmFFKM - FFPM90 Shore ANee53 icon
Placeholder O-ring Black109 mm x 2 mmFFKM - FFPM90 Shore ANee57 icon
O-Ring 251x7 Kalrez-FFKM - 90 Shore A - Black - SES-799544 O-ring Black251 mm x 7 mmFFKM - FFPM90 Shore ANee59 icon
O-Ring 522x8.5 Kalrez-FFKM - 90 Shore A - Black - SES-803649 O-ring Black522 mm x 8.5 mmFFKM - FFPM90 Shore ANee55 icon
O-Ring 16.5x1.6 Kalrez-FFKM - 90 Shore A - Black - SES-788256 O-ring Black16.5 mm x 1.6 mmFFKM - FFPM90 Shore ANee58 icon
O-Ring 51.7x5.3 Kalrez-FFKM - 90 Shore A - Black - SES-792299 O-ring Black51.7 mm x 5.3 mmFFKM - FFPM90 Shore ANee51 icon
O-Ring 131.5x3.55 Kalrez-FFKM - 90 Shore A - Black - SES-796430 O-ring Black131.5 mm x 3.55 mmFFKM - FFPM90 Shore ANee56 icon
O-Ring 301x2 Kalrez-FFKM - 90 Shore A - Black - SES-800500 O-ring Black301 mm x 2 mmFFKM - FFPM90 Shore ANee55 icon
O-Ring 9.5x2.8 Kalrez-FFKM - 90 Shore A - Black - SES-786979 O-ring Black9.5 mm x 2.8 mmFFKM - FFPM90 Shore ANee55 icon
O-Ring 37.5x2.65 Kalrez-FFKM - 90 Shore A - Black - SES-791043 O-ring Black37.5 mm x 2.65 mmFFKM - FFPM90 Shore ANee58 icon
O-Ring 102x5 Kalrez-FFKM - 90 Shore A - Black - SES-795182 O-ring Black102 mm x 5 mmFFKM - FFPM90 Shore ANee54 icon
O-Ring 238x3 Kalrez-FFKM - 90 Shore A - Black - SES-799255 O-ring Black238 mm x 3 mmFFKM - FFPM90 Shore ANee54 icon
O-Ring 489x7 Kalrez-FFKM - 90 Shore A - Black - SES-803363 O-ring Black489 mm x 7 mmFFKM - FFPM90 Shore ANee57 icon
O-Ring 928.6x3.53 Kalrez-FFKM - 90 Shore A - Black - SES-804345 O-ring Black928.6 mm x 3.53 mmFFKM - FFPM90 Shore ANee51 icon
O-Ring 13.46x1.4 Kalrez-FFKM - 90 Shore A - Black - SES-787719 O-ring Black13.46 mm x 1.4 mmFFKM - FFPM90 Shore ANee53 icon
O-Ring 45x6.4 Kalrez-FFKM - 90 Shore A - Black - SES-791765 O-ring Black45 mm x 6.4 mmFFKM - FFPM90 Shore ANee54 icon
O-Ring 117.8x6.35 Kalrez-FFKM - 90 Shore A - Black - SES-795899 O-ring Black117.8 mm x 6.35 mmFFKM - FFPM90 Shore ANee57 icon
O-Ring 273x10 Kalrez-FFKM - 90 Shore A - Black - SES-799973 O-ring Black273 mm x 10 mmFFKM - FFPM90 Shore ANee52 icon
O-Ring 634x7 Kalrez-FFKM - 90 Shore A - Black - SES-804082 O-ring Black634 mm x 7 mmFFKM - FFPM90 Shore ANee54 icon
O-Ring 240x9 Kalrez-FFKM - 90 Shore A - Black - SES-799311 O-ring Black240 mm x 9 mmFFKM - FFPM90 Shore ANee53 icon
O-Ring 493x6 Kalrez-FFKM - 90 Shore A - Black - SES-803421 O-ring Black493 mm x 6 mmFFKM - FFPM90 Shore ANee50 icon
O-Ring 10.5x1.75 Kalrez-FFKM - 90 Shore A - Black - SES-787159 O-ring Black10.5 mm x 1.75 mmFFKM - FFPM90 Shore ANee59 icon
O-Ring 39.3x1.78 Kalrez-FFKM - 90 Shore A - Black - SES-791229 O-ring Black39.3 mm x 1.78 mmFFKM - FFPM90 Shore ANee50 icon
O-Ring 106x2.5 Kalrez-FFKM - 90 Shore A - Black - SES-795365 O-ring Black106 mm x 2.5 mmFFKM - FFPM90 Shore ANee58 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 N993 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 N993 certified made from FFKM, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.