Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.315 in
(8.00 mm)
16.732 in
(425.00 mm)
NBR Parker N0756-75 O-Ring, Size: 8X425
Material: NBR Parker N0756-75 O-Ring
Size: Metric 8X425 O-Ring
Part Number: N0756-75-OR-8X425
Color: Black
Detailed Description
N0756-75-OR-8X425 is a Black, 75 Shore A, NBR (Nitrile, Buna-N) O-Ring made from Parker Seal® (Parker). It is a 75 durometer NBR (Nitrile, Buna-N). N0756-75-OR-8X425 is Metric size 8X425 O-Ring also referred to as 8mm (Cross Sectional Diameter (CS)) x 425mm (Inside Diameter (ID)). Material: 75 Durometer NBR Parker N0756-75 O-Ring Size: Metric 8X425, 8mm CS X 425mm ID (0.315" CS X 16.732" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | N0756-75 |
| Brand | Parker Seal® (Parker) |
| Material | NBR (Nitrile, Buna-N) |
| Color | Black |
| Durometer | 75 Shore A Hardness |
| High Temperature | 121 °C / 250 °F |
| Low Temperature | -54 °C / -65 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | Metric |
| Size | 8X425 |
| Cross Section (CS) | 8.00 mm / 0.315 in |
| Inside Diameter (ID) | 425.00 mm / 16.732 in |
Parker’s N0756-75 is a 75 Shore A black nitrile rubber (NBR) compound engineered for low-temperature sealing applications that require reliable oil resistance and extended temperature capability. Qualified to ASTM D2000/J200 M7BG810 and AMS-P-83461, it delivers dependable sealing performance across a service temperature range of -65°F to 275°F, maintaining flexibility in cold environments while retaining strength at elevated temperatures. The compound is compatible with petroleum-based oils, water up to 212°F, salt and alkali solutions, and weak acids, making it suitable for a wide range of industrial and aerospace-adjacent fluid systems. Its balanced durometer supports low compression set and consistent sealing in static and light dynamic applications.
N0756-75 is commonly used for O-rings and gaskets in hydraulic systems, pumps, valves, and equipment exposed to cold starts and temperature cycling. It is not recommended for aromatic fuels, strong acids, glycols, ozone exposure, or polar solvents. This material is selected when low-temperature elasticity and documented specification compliance are critical. Canyon Components offers equivalent NBR materials designed to match the low-temperature performance, hardness, and AMS-P-83461 compliance of Parker N0756-75.
Common relevant keywords:
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