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-207 C70 Neoprene (Polychloroprene) 70 Duro O-Rings


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Min:  2
  • Model: C70207
  • 83 in Stock
  • 9/16"ID X 13/16"OD X 1/8"CS
  • Actual: 0.546"ID X 0.139"CS
  • Metric: 13.87mm ID X 3.53mm CS
  • PDF Data Sheets

O-ring Size: 9/16"ID X 13/16"OD X 1/8"CS

Neoprene O-Rings:

The first synthetic rubber developed commercially, introduced in 1931, exhibits generally good ozone, aging and chemical resistance. It has good mechanical properties over a wide temperature range. Vulcanizates of chloroprene display little significant change after prolonged outdoor exposure. Because of its chlorine content, flame resistance is superior to that of most other rubbers. Neoprene vulcanizates, especially O-Rings, sometimes exhibit distortion due to crystallization of the rubber at room temperature. This effect can be completely reversed by warming the parts in low heat. Neoprene is especially well suited to rubber-to-metal bonding.

Chemical Resistance:

  • Paraffin base mineral oil with low DPI, e.g. ASTM oil No. 1
  • Silicone oil and grease
  • Water and water solvents at low temperatures
  • Refrigerants
  • Freon, 113, 114, 114B2, 13, 22, 31, 32, 502 (F22+F316), C318, and TF
  • Ammonia
  • Carbon dioxide
  • Improved ozone, weathering and aging resistance compared with nitrile rubber.

Limited Compatibility:

  • Naphthalene based mineral oil (IRM 902 and IRM 903 oils)
  • Low molecular aliphatic hydrocarbons (propane, butane, fuel)
  • Glycol based brake fluids.

Not Compatible With:

  • Aromatic hydrocarbons (benzene)
  • Chlorine, Wet
  • Chlorinated hydrocarbons (trichloroethylene)
  • Brake Fluid
  • Gasoline
  • Polar solvents (ketones, esters, ethers, acetones).

Operating temperature: -40° to +225°F

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Stock O-Rings in over 20 different compounds and durometers the following six are the standard rubber materials in a range of durometers (Shore A) hardness to satisfy practically any service condition:

Viton® O-Rings / FKM: Fluorocarbon (Viton®) exhibits exceptional resistance to chemicals, oils, temperature extremes (-13°F to +446°F), low compression set, low gas permeability and excellent aging characteristics. Applications include: aircraft engines, automotive fuel handling systems, and chemical processing industries. FKM is also suitable for high vacuum applications. It is not recommended for exposure to ketones, alkalis, and Skydrol® fluids. Custom compounds are available with improved chemical and low temperature resistance.
AS-568 Viton® O-Rings | Metric Viton® O-Rings

Buna-N O-Rings / Nitrile O-Rings / NBR: Nitrile (Buna-N) is the most widely used elastomer due to its excellent resistance to petroleum products, operating temperature range (-40°F to +257°F) and one of the best performance-to-cost values. It's an ideal material for aerospace, automotive, propane and natural gas applications. Special Hydrogenated Nitrile (HNBR) compounds can improve resistance to direct ozone, sunlight, and weather exposure while increasing temperature range to +300°F.
AS-568 Buna-N O-Rings | Metric Buna-N O-Rings

Ethylene-Propylene / EPDM O-Rings: EPDM has outstanding resistance to heat, water and steam, alkali, mild acidic and oxygenated solvents, ozone, and sunlight (-40ºF to +275ºF); but it is not recommended for gasoline, petroleum oil and grease, and hydrocarbon environments. This popular rubber compound is usually the first choice for low torque drive belt applications.
AS-568 EPDM O-Rings | Metric EPDM O-Rings

Fluorosilicone O-Rings / FVMQ: Fluorosilicone (-75º to +400ºF) combines the good high and low temperature stability of silicones with the fuel, oil, and solvent resistance of fluorocarbons. FVMQ is unparalleled for aerospace fuel systems, auto fuel emission control systems and to meet or exceed government, military, aerospace, automotive, industrial and commercial specifications. However, due to relatively low tear strength, high friction and limited abrasion resistance of these materials, they are generally not used in dynamic applications. They are also not recommended for exposure to brake fluids, hydrazine, or ketones.
AS-568 Fluorosilicone O-Rings | Metric Fluorosilicone O-Rings

Silicone O-Rings / VMQ: In the Silicone family, you will find compounds which are superior as static seals in extreme temperature conditions. Standard compounds handle operating temperatures -85º to +400ºF. Silicone compounds are popular in food and medical applications because they are very clean and do not impart odor or taste. Special Phenyl silicones can be used down to -148°F.
AS-568 Silicone O-Rings | Metric Silicone O-Rings

Neoprene® O-Rings / CR: Neoprene (-40º to +250ºF) is reasonably priced and features good resistance to petroleum oils, ozone, sunlight and oxygen aging, relatively low compression set, good resilience and outstanding physical toughness. It is the preferred sealing material for the refrigeration industry because of its resistance to ammonia and Freon®.
AS-568 Neoprene® O-Rings