Sterling Seal ORBN239x10 O-Ring, Number-239 Standard, Good/Excellent Resistance to Many Petroleum Oils/Greases, Hydraulic Fluids, Alcohol, Buna Nitrile Rubber, 3-5/8" ID, 3-7/8" OD (Pack of 10)
Sterling Seal Buna N "O" Rings are used across a wide temperature range from -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C)
Buna N "O" rings are used for Oil resistant applications of all types. For example; Low temperature military uses. Off-road equipment, Automotive, marine, and aircraft fuel systems
Sterling Seal Buna N "O" Rings are compatible with Aliphatic Hydrocarbons (propane, butane, petroleum oil, mineral oils and greases, diesel fuel and fuel oil)
Buna N or Nitrile have good mechanical properties when compared with other elastomers and high wear resistance
Buna N "O" rings are not Compatible with product fuels with a high aromatic content; aromatic hydrocarbons (benzene); Chlorinated hydrocarbons (Trichloroethylene)