Othmro Nitrile Rubber O-Rings 30mm OD 25mm ID 2.5mm Width Metric Buna-N Sealing Gasket Black Color 50PCS

Circular Cross-Section They are circular in shape, round in cross-section. Designed for use in a wide variety of sealing applications. 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. Nitrile Butadiene Rubber O-rings Good mechanical properties and high wear resistance NBR. Good resistance to many petroleum oils, greases, hydraulic fluids, mineral oil, and grease. 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.