NBR NB70BK51 O-Ring, Size: -011
Material: NBR NB70BK51 O-Ring
Size: AS568 -011 O-Ring
Part Number: NB70BK51-OR-011
NB70BK51
NBR (Nitrile, Buna-N)
70
Shore A
MS28775, AMS-P-25732 QPL
Color: Black
Detailed Description
NB70BK51-OR-011 is a Black, 70 Shore A, NBR (Nitrile, Buna-N) O-Ring. NB70BK51 is manufactured with the following features & specifications: MS28775, AMS-P-25732 QPL. NB70BK51-OR-011 is AS568 size -011 O-Ring also referred to as 1.78mm (Cross Sectional Diameter (CS)) x 7.65mm (Inside Diameter (ID)).
Material: NBR NB70BK51 O-Ring
Size: AS568 -011, 1.78mm CS X 7.65mm ID (0.070" CS X 0.301" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | NB70BK51 |
| Material | NBR (Nitrile, Buna-N) |
| Color | Black |
| Durometer | 70 Shore A |
| High Temperature | 135 °C / 275 °F |
| Low Temperature | -55 °C / -67 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -011 |
| Cross Section (CS) | 1.78 mm / 0.070 in |
| Inside Diameter (ID) | 7.65 mm / 0.301 in |
| Other Specifications | |
MS28775, AMS-P-25732 QPL | |
NB70BK51 is Canyon’s military specification 70 Shore A black nitrile rubber (NBR) compound qualified to MS28775, MIL-P-25732, and AMS-P-25732 QPL for aerospace and defense sealing applications. This material is engineered for O-rings and gaskets that require documented Mil-Spec compliance, improved low- and high-temperature performance, and reliable mechanical stability under demanding service conditions. With a service temperature range of -55°C to 135°C (-67°F to 275°F), NB70BK51 maintains elasticity in cold environments while delivering low compression set and good abrasion resistance for long service life. It is widely used in fuel systems, hydraulic assemblies, and aerospace hardware where qualification, traceability, and consistency are critical. Compare NB70BK51 to Parker N0304-75 for equivalent MS28775 and AMS-P-25732 sealing performance.
Common relevant keywords:
MS28775 O-rings, MIL-P-25732 nitrile rubber, AMS-P-25732 QPL seals, military spec NBR O-rings, aerospace nitrile gaskets, 70 Shore A Mil-Spec rubber, aviation fuel system seals, low temperature military elastomer, defense grade nitrile O-rings, Parker N0304-75 equivalent, Datasheet, TDS, Test Report, MTR, MSDS, SDS