FFKM O-rings EN993

Product		Dimensions	Material	Hardness (Shore A)	Certification	Stock
	O-ring Black	8.8 mm  x 3.1 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	11 mm  x 1.55 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	13.50 mm  x 2.39 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	15.6 mm  x 1.96 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	18.4 mm  x 4 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	20.8 mm  x 1.9 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	24.8 mm  x 3 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	28.16 mm  x 0.8 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	32.93 mm  x 3.53 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	39 mm  x 3 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	421 mm  x 6 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	44 mm  x 3.55 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	444 mm  x 7 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	471 mm  x 6.5 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	520 mm  x 5.33 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	642 mm  x 8 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	47.5 mm  x 4.8 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	50.9 mm  x 12.7 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	54.5 mm  x 3.1 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	58.8 mm  x 6.35 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	62.97 mm  x 3.42 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	70 mm  x 2.2 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	81 mm  x 2 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	88.10 mm  x 2.4 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	99.7 mm  x 5.7 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	113.8 mm  x 5.5 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	124 mm  x 3.5 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	140.6 mm  x 1.78 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	152.9 mm  x 8.6 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	110 mm  x 11 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	121 mm  x 4 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	139.2 mm  x 8.4 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	154.6 mm  x 5 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	168 mm  x 8 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	184 mm  x 3.5 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	202 mm  x 2.5 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	225 mm  x 5.3 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	250 mm  x 3 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	269 mm  x 3.53 mm	FFKM - FFPM	90 Shore A	Nee
	O-ring Black	294 mm  x 14 mm	FFKM - FFPM	90 Shore A	Nee

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.