NBR Parker N0300-90 O-Ring, Size: -018
Material: NBR Parker N0300-90 O-Ring
Size: AS568 -018 O-Ring
Part Number: N0300-90-OR-018
Parker Seal® (Parker)
N0300-90
NBR (Nitrile, Buna-N)
90
Shore A
General Purpose Material
Color: Black
Detailed Description
N0300-90-OR-018 is a Black, 90 Shore A, NBR (Nitrile, Buna-N) O-Ring made from Parker Seal® (Parker). Parker Seal® (Parker) N0300-90 is manufactured with the following features & specifications: General Purpose Material. N0300-90-OR-018 is AS568 size -018 O-Ring also referred to as 1.78mm (Cross Sectional Diameter (CS)) x 18.77mm (Inside Diameter (ID)).
Material: NBR Parker N0300-90 O-Ring
Size: AS568 -018, 1.78mm CS X 18.77mm ID (0.070" CS X 0.739" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | N0300-90 |
| Brand | Parker Seal® (Parker) |
| Material | NBR (Nitrile, Buna-N) |
| Color | Black |
| Durometer | 90 Shore A |
| High Temperature | 82 °C / 180 °F |
| Low Temperature | -40 °C / -40 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -018 |
| Cross Section (CS) | 1.78 mm / 0.070 in |
| Inside Diameter (ID) | 18.77 mm / 0.739 in |
Parker’s N0300-90 is a 90 Shore A black nitrile rubber (NBR) compound engineered for high-hardness sealing applications such as back-up rings where extrusion resistance and dimensional stability are critical. Designed to meet ASTM D2000 7BG915 requirements, this material performs reliably across a service temperature range of -40°F to 180°F while maintaining strong resistance to petroleum-based oils. It is also compatible with water up to 212°F, salt and alkali solutions, and weak acids, supporting use in hydraulic and industrial fluid systems. The high durometer formulation helps prevent seal extrusion in high-pressure environments when used in conjunction with O-rings.
N0300-90 is commonly used for back-up rings and support components in hydraulic cylinders, valves, and pressure-containing assemblies where standard elastomers may deform under load. It is not recommended for aromatic fuels, strong acids, glycols, ozone exposure, or polar solvents. This compound provides a dependable balance of hardness, oil resistance, and specification compliance for pressure-intensive sealing designs. Canyon Components offers equivalent high-durometer NBR materials designed to match the performance characteristics of Parker N0300-90 for back-up ring and extrusion-resistant sealing applications.
Common relevant keywords:
NBR back-up rings, 90 Shore A nitrile rubber, extrusion resistant elastomer, high durometer NBR seals, hydraulic back-up ring material, oil resistant nitrile gaskets, ASTM D2000 nitrile compound, pressure sealing support rings, industrial hydraulic sealing components, Parker N0300-90 equivalent, Datasheet, TDS, Test Report, MTR, MSDS, SDS