O-ring Packing in NBR, AS568 Standard, Thickness of 1.78 mm | GMORS

The NBR (Nitrile Butadiene Rubber) O-ring AS568 Standard from GMORS (Taiwan) is a robust and reliable sealing solution for industrial applications requiring compatibility with oils, fuels, lubricants, and hydraulic fluids. With a cross-sectional thickness of 1.78 mm and available in 3 AS568 Dash numbers (24, 44, and 50), it covers internal diameters from 28.30 mm to 133.07 mm. Manufactured under the AS568 standard (American O-ring standard), it ensures interchangeability and dimensional compatibility with equipment and components designed to this standard. Manufacturer: GMORS (Taiwan).

Available Dimensions by AS568 Dash Number

• Dash 24: 1.78 mm thickness × 28.30 mm internal diameter
• Dash 44: 1.78 mm thickness × 94.97 mm internal diameter
• Dash 50: 1.78 mm thickness × 133.07 mm internal diameter

Applications

• Hydraulic and pneumatic systems: sealing pistons, rods, covers, and connectors in cylinders and actuators
• Industrial pumps and valves: sealing shafts, covers, and bodies in oil, water, and process fluid pumps
• Automotive and machinery industry: sealing in engines, gearboxes, brake systems, and hydraulic steering
• Oil and chemical industry: sealing in process equipment with mineral oils, fuels, and lubricants
• Refrigeration and air conditioning equipment: sealing in compressors and valves with NBR-compatible refrigerants
• General industrial maintenance: replacement of worn O-rings in equipment with AS568 1.78 mm section specification

Technical Specifications

• Material: NBR (Nitrile Butadiene Rubber)
• Standard: AS568 (American O-ring standard)
• Cross-sectional thickness: 1.78 mm
• Available Dash numbers: 24, 44, 50
• Internal diameters: 28.30 mm to 133.07 mm (depending on selected Dash)
• Temperature range: -30 °C to +100 °C (peaks up to +120 °C)
• Chemical resistance: Mineral oils, fuels, lubricants, water, and non-polar solvents
• Sales unit: Unit
• Country of origin: Taiwan
• Manufacturer: GMORS

NBR Material Chemical Compatibility

NBR is compatible with mineral oils, greases, fuels, lubricants, water, and non-polar solvents. It is not compatible with concentrated acids, ketones, esters, ozone, steam, or glycol-based brake fluids. For applications with steam, hot water, or alkaline fluids, consider EPDM O-rings. For applications with high temperatures or aggressive chemical fluids, consider FKM/Viton.

Other Common Names

This component is also known as: O-ring NBR AS568 1.78mm, nitrile O-ring AS568 1.78 section, NBR toroidal gasket American standard, GMORS NBR O-ring Honduras, NBR AS568 Dash 24 44 50 toroidal seal, NBR O-ring 1.78mm cross section, NBR AS568 hydraulic gasket Honduras, industrial NBR O-ring 1.78mm Taiwan.