Specification Brand : Orings-Online BulletPoint : Made of Viton (fluorocarbon elastomer) for use with a variety of chemicals and fuels^Durometer (hardness) of 90A^Round cross-section provides a seal between cylindrical overlapping surfaces^For use across a wide temperature range from -15 degrees F (-26 degrees C) to 450 degrees F (232 degrees C) BulletPoint1 : O-rings are New and manufactured with high quality and control standards. BulletPoint2 : Resealable bag labeled with the o-ring size. BulletPoint3 : Sizing charts available for printout from the brands (Orings-Online) website free of charge. BulletPoint4 : 7/32" Outside Diameter BulletPoint5 : 1/16" Cross Section Color : Black ExternallyAssignedProductIdentifier1 : 0701748961324 ExternallyAssignedProductIdentifier2 : 701748961324 ItemName : 008 Standard Dash Size -008 Buna-N NBR O-Rings Bulk, 90 Durometer, Black, 3/16" ID, 5/16" OD, 1/16" Cross Section (50 Pack/Pieces) ItemPackageDimensions_Height : 1.016 centimeters ItemPackageDimensions_Length : 8.636 centimeters ItemPackageDimensions_Width : 10.414 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : o-ring-seals Manufacturer : Orings-Online Material : Nitrile (Buna-N, NBR) ModelNumber : M1.5 NumberOfItems : 50 NumberOfPieces : 20 PartNumber : OO-008-90-50 ProductDescription : Nitrile is the one of the most widely used rubber materials, due to its combination of low cost, resistance to many chemicals, and good physical properties. The acrylonitrile content of this highly polar elastomer provides excellent oil and gas permeation resistance, which increases as the level of ACN increases. However, an increase in the acrylonitrile content compromises low temperature flexibility, and increases compound hardness. Typical ACN content ranges from 18% to 50%. Nitrile should not be exposed to direct sunlight or moderate to high levels of atmospheric ozone, as rapid deterioration will result. However, NBR will accept many anti-degradants, most notably PVC, which offer some degree of improvement of these deficiencies. Nitriles are usually sulfur cured, but peroxide curing is also possible, resulting in improved compression set. Buna-nitrile can have high tensile strength, and abrasion, tear, and compression set resistance. It can be used in temperatures between -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C), and is compatible for use with petroleum, HFA, HFB and HFC fluids, vegetable oil, alcohol, acids and aliphatic hydrocarbons. These Buna O-rings have a shore durometer (Hardness of a material, and its resistance to permanent indentation) listed in the title above. A higher durometer value indicates greater resistance to indentation. O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with a round cross section, and a hole in the center, similar to a doughnut. O-rings are available in various sizes, and can be ordered based on required nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter. **Note: The picture shows an example of the o-rings, you will receive an item of similar design in the amount and specifications stated in the title. Size : M1.5 UnitCount : 25 UnspscCode : 31410000