The Standard SAE 70D Buna-N O-Ring is a reliable sealing component designed for use in hydraulic, pneumatic, and fluid transfer systems. Manufactured from Buna-N (Nitrile) rubber with a 70 durometer hardness, this O-ring offers excellent resistance to oils, fuels, and many petroleum-based fluids. Its flexible yet durable construction allows it to create a tight seal between mating surfaces, helping prevent leaks in fittings, valves, cylinders, and other mechanical assemblies. In other words, it’s a small part with a big responsibility—keeping fluids where they belong instead of slowly escaping.
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Key Features / Specifications
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