HNBR Parker KA157-70 O-Ring, Size: -002
Material: HNBR Parker KA157-70 O-Ring
Size: AS568 -002 O-Ring
Part Number: KA157-70-OR-002
Color: Black
Detailed Description
KA157-70-OR-002 is a Black, 70 Shore A, HNBR (Hydrogenated Nitrile) O-Ring made from Parker Seal® (Parker). It is a 70 durometer HNBR (Hydrogenated Nitrile). Parker Seal® (Parker) KA157-70 is manufactured with the following features & specifications: General Purpose Material. KA157-70-OR-002 is AS568 size -002 O-Ring also referred to as 1.27mm (Cross Sectional Diameter (CS)) x 1.07mm (Inside Diameter (ID)).
Material: 70 Durometer HNBR Parker KA157-70 O-Ring
Size: AS568 -002, 1.27mm CS X 1.07mm ID (0.050" CS X 0.042" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | KA157-70 |
| Brand | Parker Seal® (Parker) |
| Material | HNBR (Hydrogenated Nitrile) |
| Color | Black |
| Durometer | 70 Shore A Hardness |
| High Temperature | 149 °C / 300 °F |
| Low Temperature | -34 °C / -29 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -002 |
| Cross Section (CS) | 1.27 mm / 0.050 in |
| Inside Diameter (ID) | 1.07 mm / 0.042 in |
Parker’s KA157-70 is a 70 Shore A black HNBR compound engineered for sealing applications that require improved thermal stability and chemical resistance compared to standard NBR materials. Tested to ASTM D2000 M3DH710, it demonstrates non-brittle performance after exposure to low temperatures and operates reliably across a service temperature range of approximately -25°F to 300°F, with short-term capability up to 325°F. This compound provides strong resistance to petroleum-based and synthetic hydrocarbon oils and greases, weathering, ozone, cold and hot water, alcohols, glycols, and R-134a refrigerant. The hydrogenated nitrile formulation supports low compression set and long-term durability in both static and moderate dynamic sealing environments.
KA157-70 is commonly used in automotive, industrial, and fluid handling systems where resistance to oils, temperature cycling, and environmental exposure is required. It is not recommended for automotive brake fluids, commercial aircraft hydraulic fluids, concentrated strong acids, polar solvents such as MEK and acetone, or chlorinated hydrocarbon solvents. This HNBR compound offers a balanced combination of flexibility, heat resistance, and chemical compatibility for demanding service conditions. Canyon Components offers equivalent HNBR materials designed to match the performance characteristics of Parker KA157-70 for oil, temperature, and weather-resistant sealing applications.
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