HNBR Parker KB190-50 O-Ring, Size: -007
Material: HNBR Parker KB190-50 O-Ring
Size: AS568 -007 O-Ring
Part Number: KB190-50-OR-007
Color: Black
Detailed Description
KB190-50-OR-007 is a Black, 50 Shore A, HNBR (Hydrogenated Nitrile) O-Ring made from Parker Seal® (Parker). It is a 75 durometer HNBR (Hydrogenated Nitrile). Parker Seal® (Parker) KB190-50 is manufactured with the following features & specifications: General Purpose Material. KB190-50-OR-007 is AS568 size -007 O-Ring also referred to as 1.78mm (Cross Sectional Diameter (CS)) x 3.68mm (Inside Diameter (ID)).
Material: 50 Durometer HNBR Parker KB190-50 O-Ring
Size: AS568 -007, 1.78mm CS X 3.68mm ID (0.070" CS X 0.145" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | KB190-50 |
| Brand | Parker Seal® (Parker) |
| Material | HNBR (Hydrogenated Nitrile) |
| Color | Black |
| Durometer | 50 Shore A Hardness |
| High Temperature | 149 °C / 300 °F |
| Low Temperature | -32 °C / -26 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -007 |
| Cross Section (CS) | 1.78 mm / 0.070 in |
| Inside Diameter (ID) | 3.68 mm / 0.145 in |
Parker’s KB190-50 is a 50 Shore A black HNBR compound developed for automotive sealing applications that require flexibility, oil resistance, and durability across wide temperature ranges. Hydrogenated nitrile chemistry provides improved thermal stability and chemical resistance compared to standard NBR, supporting reliable performance from approximately -25°F to 300°F, with short-term capability up to 325°F. This compound is compatible with petroleum-based hydraulic oils, motor oils, transmission fluids, greases, R134a refrigerant, water and glycol mixtures, steam, and HFA, HFB, and HFC hydraulic fluids. Its softer durometer allows effective sealing under lower clamp loads while maintaining resistance to ozone, aging, and weathering.
KB190-50 is commonly used in automotive systems such as engine components, fluid handling assemblies, and sealing locations exposed to oils, coolants, and temperature cycling. It is not recommended for polar solvents such as ketones and esters, strong acids, chlorinated hydrocarbons, or automotive and aircraft brake fluids. This HNBR formulation provides a balanced combination of flexibility, heat resistance, and oil compatibility for automotive and light industrial service. Canyon Components offers equivalent HNBR materials designed to match the performance characteristics of Parker KB190-50 for automotive sealing applications.
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