O-ring packing in NBR, Thickness of 1.78 mm | Sealing Tech-G

The NBR (Nitrile Butadiene Rubber) O-ring with 1.78 mm thickness from Sealing Tech-G is a robust and reliable sealing solution for various industrial applications. Highly compatible with oils, fuels, lubricants, water, and numerous non-polar solvents, it is the elastomer of choice for environments where hydrocarbons are present. Its advanced formulation ensures excellent abrasion and tear resistance, extending the seal's lifespan and minimizing maintenance costs. The 1.78 mm thickness corresponds to the AS568 series (American O-ring standard), being one of the most widely used thicknesses in precision industrial and automotive applications. Available in 10 internal diameters: from 1.78 mm to 91.7 mm.

Applications

• Hydraulic and pneumatic systems: cylinders, valves, and precision actuators
• Automotive: engine, transmission, and fuel system seals (AS568 series)
• Pumps and compressors: static and dynamic seals in contact with oils
• Industrial instrumentation: precision seals in measurement and control equipment
• Industrial valves: seat and stem seals in oily fluids
• Oil and gas industry: seals in equipment exposed to hydrocarbons
• General machinery: inspection gaskets, covers, and connections with oil or water

Technical Specifications

• Material: NBR (Nitrile Butadiene Rubber)
• Seal thickness (CS): 1.78 mm (AS568 series)
• Available internal diameters: 1.78 / 8.73 / 9.25 / 10.82 / 14 / 15 / 15.6 / 19.5 / 79 / 91.7 mm
• Temperature range: -30 °C to +100 °C (peaks up to +120 °C)
• Chemical resistance: Mineral oils, fuels, lubricants, water, non-polar solvents
• Reference standard: AS568 (American Standard)
• Configuration: O-ring
• Sales unit: Unit
• Country of origin: Taiwan
• Brand: Sealing Tech-G

Chemical Compatibility

NBR is compatible with mineral oils, fuels, lubricants, water, and non-polar solvents. It is not compatible with concentrated acids, ketones, esters, ozone, or glycol-based brake fluids. For these applications, consider EPDM or VITON O-rings.

Other Common Names

This component is also known as: o-ring NBR 1.78 mm, nitrile o-ring AS568, NBR round packing American series, nitrile O-ring 1.78, NBR O-ring 1.78mm CS, nitrile rubber o-ring, NBR O-ring gasket, nitrile rubber O-ring AS568, industrial o-ring packing Honduras.