5 Pack 228 O-Ring for Sterling Seal & Supply, Buna-Nitrile Seal, 70A

Key features

• Product Specifications: This O-ring set includes 5 Buna-Nitrile seals with dimensions of 2-1/4" ID, 2-1/2" OD, and 1/8" width. these versatile rubber rings serve as reliable replacements for 2 inch O-ring and 2.5 inch O-ring applications across various industrial and mechanical uses. The round cross-section design ensures effective sealing between overlapping mating surfaces.
• Material Compatibility:​Made of Buna-Nitrile material with 70A durometer hardness, these O-rings perform effectively with petroleum-based oils, HFA/HFB/HFC fluids, vegetable oils, aliphatic hydrocarbons, silicone greases, ethylene glycol, dilute acids, and water below 100°C (212°F). Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering and should therefore not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light.
• Temperature Resistance:​With a functional temperature range of -35°C (-31°F) to 120°C (248°F), these O-rings maintain flexibility and sealing integrity in both extreme cold and high-heat environments. The material offers high tensile strength and compression set resistance within this range. Suitable for automotive, hydraulic, and industrial equipment requiring reliable cross-section O-ring performance.
• Versatile Applications:​Designed for use in pumps, valves, connectors, engines, faucets, flanges, and machinery requiring durable sealing solutions. Compatible with 2 inch pool O-ring Craftsman applications and general industrial maintenance. Provides effective sealing as O2 ring alternatives in oxygen-related systems when material compatibility is confirmed. Avoid use in ozone-generating equipment or welding applications.
• Quality Assurance:​Manufactured to precise dimensional standards, these Buna-Nitrile O-rings offer consistent cross-section performance and reliable sealing force. The 70A durometer provides optimal balance between flexibility and compression resistance, ensuring long-term service life in demanding conditions. The circular shape with round cross-section ensures proper sealing in various cylindrical applications.

Free shipping included. 30-day hassle-free returns.