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FKM O-Rings
BS375 5.33mm Section 240.67mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 5.33mm
Inside Diameter: 240.67mm
Outside Diameter: 251.33mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS430 7mm Section 129.54mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 7mm
Inside Diameter: 129.54mm
Outside Diameter: 143.54mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS431 7mm Section 132.72mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 7mm
Inside Diameter: 132.72mm
Outside Diameter: 146.72mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS432 7mm Section 135.89mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 7mm
Inside Diameter: 135.89mm
Outside Diameter: 149.89mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS536 1.78mm Section 91.7mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 1.78mm
Inside Diameter: 91.7mm
Outside Diameter: 95.26mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS558 1.78mm Section 161.16mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 1.78mm
Inside Diameter: 161.16mm
Outside Diameter: 164.72mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS559 1.78mm Section 164.34mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 1.78mm
Inside Diameter: 164.34mm
Outside Diameter: 167.9mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS622 5.33mm Section 100mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 5.33mm
Inside Diameter: 100mm
Outside Diameter: 110.66mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS860 5.33mm Section 117.48mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 5.33mm
Inside Diameter: 117.48mm
Outside Diameter: 128.14mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS865 5.33mm Section 133.35mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 5.33mm
Inside Diameter: 133.35mm
Outside Diameter: 144.01mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
BS866 5.33mm Section 136.53mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 5.33mm
Inside Diameter: 136.53mm
Outside Diameter: 147.19mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
2.5mm Section 108mm Bore 75 Shore FKM Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 2.5mm
Inside Diameter: 108mm
Outside Diameter: 113mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
2.5mm Section 123mm Bore 75 Shore FKM Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 2.5mm
Inside Diameter: 123mm
Outside Diameter: 128mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
2.5mm Section 142mm Bore 75 Shore FKM Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 2.5mm
Inside Diameter: 142mm
Outside Diameter: 147mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
2.5mm Section 144mm Bore 75 Shore FKM Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 2.5mm
Inside Diameter: 144mm
Outside Diameter: 149mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
2.5mm Section 86mm Bore 75 Shore FKM Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 2.5mm
Inside Diameter: 86mm
Outside Diameter: 91mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
2mm Section 150mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 2mm
Inside Diameter: 150mm
Outside Diameter: 154mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
3mm Section 113mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 3mm
Inside Diameter: 113mm
Outside Diameter: 119mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
3mm Section 121mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 3mm
Inside Diameter: 121mm
Outside Diameter: 127mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
3mm Section 124.5mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 3mm
Inside Diameter: 124.5mm
Outside Diameter: 130.5mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
3mm Section 131mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 3mm
Inside Diameter: 131mm
Outside Diameter: 137mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
3mm Section 133mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 3mm
Inside Diameter: 133mm
Outside Diameter: 139mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
3mm Section 135mm Bore FKM 75 Shore Rubber O-Ring
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 3mm
Inside Diameter: 135mm
Outside Diameter: 141mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
3mm Section 148mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 3mm
Inside Diameter: 148mm
Outside Diameter: 154mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
3mm Section 149mm Bore FKM 75 Shore Rubber O-Ring Allow 2-3 Days
FKM Rubber O Rings: Widely used and the simplest types of seal they are found everywhere from plumbing installations to the space shuttle, they are common in engines and gearboxes, garden [show more]... |
Cross Section: 3mm
Inside Diameter: 149mm
Outside Diameter: 155mm
Hardness: 75 Shore
O-ring Lubricants?
O-ring Tools
FKM O Rings
Simply Bearings is a market-leading supplier of replacement FKM O rings for a huge variety of industrial equipment. Our modern warehouse is stocked with a wide selection of differently sized and rated O rings - a selection that is so large that we are confident that we can provide you with the precise O ring to meet any of your requirements.
O rings are perhaps the most widely used and certainly the simplest form of seal, which is unsurprising given that they are largely inexpensive, reliable and easy to mount. They are found everywhere from pumps, engines and gearboxes to SCUBA diving gear and NASA's space shuttles. O rings can be used as shaft seals, enabling both linear and rotary movement in dynamic applications - for example, rotating pump shafts and hydraulic cylinder pistons - but it can also be used in static applications as face-to-face seals.
O rings demonstrate a very high degree of chemical resistance. They can safely seal tens of thousands of PSI. Operating temperatures extend from -30c to +120c, but specific O rings have different ratings.
FKM, a form of synthetic rubber, is particularly resistant to hydrocarbons, making it an excellent rubber to use for oil seals. FKM oil seals, FKM tubing and hoses lined with FKM are commonly found in vehicles and fuel transportation applications. Some FKM oil seals are compatible even with biodiesel, which is a particularly unstable, oxidising and acidic fuel. FKM is, however, generally incompatible with ketone-based chemicals, including acetone, and certain organic acids, such as acetic acid.
FKM O rings can be used as an alternative to the Buna-N seals present in the automobile engine variable timing units in BMW's vehicles. FKM provides similar functional properties to Buna-N, but with the additional benefit of greater chemical and temperature resistances.
For more information on the specific chemical resistance ratings of any of the FKM O rings that we stock, simply click on the link for the relevant product entitled "Chemical Resistance Table. You will be presented with a long and searchable list of chemicals and information about how they interact with that specific O ring. Use of the O ring with each chemical is rated from 1 for Excellent to * for Totally Unsuitable to ensure that you find the correct product to get the job done safely.







Chemical Resistance Table [Click Here]
Tolerance Table [Click Here]
