O-ring Gasket in NBR, 3.53 mm Thickness | Sealing Tech-G

The NBR (Nitrile Butadiene Rubber) O-ring with 3.53 mm thickness from Sealing Tech-G is a precision O-ring manufactured under the AS568 dimensional standard (American SAE standard), where the 3.53 mm (0.139") thickness corresponds to the standard cross-section series of the standard. Its 12 internal diameters in decimal measurements (18.66 / 23.4 / 26.58 / 37.69 / 44.45 / 47.63 / 49.21 / 52.39 / 53.97 / 58.74 / 69.44 / 73.02 mm) are the exact dimensions of the AS568 series, ensuring direct compatibility with equipment and components designed to American standards. Highly compatible with oils, fuels, lubricants, water, and numerous non-polar solvents, it is the elastomer of choice for environments with hydrocarbons.

Applications

• Direct replacement for O-rings in equipment designed under AS568 / SAE standard (American origin)
• Hydraulic and pneumatic systems with American standard components: cylinders, valves, and actuators
• Oil and gas industry: seals in equipment, valves, and connections with SAE dimensions
• Construction and mining machinery: American-made equipment with AS568 seals
• American automotive: engine, transmission, and fuel system seals in USA-made vehicles
• Pumps and compressors with SAE specifications: cover, flange, and body seals
• Instrumentation and industrial control: precision seals in equipment with American standard
• Maintenance and repair of equipment imported from the USA and Canada

Technical Specifications

• Material: NBR (Nitrile Butadiene, Nitrile Rubber)
• Seal thickness (CS): 3.53 mm (0.139")
• Dimensional standard: AS568 / SAE (American standard)
• Available internal diameters: 18.66 / 23.4 / 26.58 / 37.69 / 44.45 / 47.63 / 49.21 / 52.39 / 53.97 / 58.74 / 69.44 / 73.02 mm
• Temperature range: -30 °C to +100 °C (peaks up to +120 °C)
• Chemical resistance: Mineral oils, fuels, lubricants, water, non-polar solvents
• 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: NBR o-ring 3.53 mm, AS568 nitrile oring, SAE nitrile packing 3.53, AS568 NBR O-ring, NBR O-ring AS568 standard, American standard NBR O-ring, nitrile rubber O-ring AS568, American standard oring packing Honduras, oring 0.139 inch thickness.