Image shown is representative and may differ from the actual product in size, proportions, and color shade
2.380 in
(60.45 mm)
4.120 in
(104.65 mm)
1/4"
NBR NB70BK51 Ring Gasket, Size: 150#-2"-RN-1/4"
Material: NBR NB70BK51 Ring Gasket
Size: 150#-2"-RN-1/4" Ring Gasket
Part Number: NB70BK51-150#-2"-RN-1/4"
Color: Black
Detailed Description
NB70BK51-150#-2"-RN-1/4" is a Black, 70 Shore A, NBR (Nitrile, Buna-N) Ring Gasket. It is a 70 durometer NBR (Nitrile, Buna-N). [ NB70BK51-150#-2"-RN-1/4" is size 150#-2"-RN-1/4" Ring Gasket also referred to as 2 (Pipe Size) x 60.45mm (ID) x 104.65mm (OD) x 1/4" (Thickness). NB70BK51-150#-2"-RN-1/4" is a size 2, 150#-RN ASME Ring Gasket. Material: 70 Durometer NBR NB70BK51 Ring Gasket Size: 150#-2"-RN-1/4", 2 Pipe Size X 60.45mm ID X 104.65mm OD X 1/4" Thickness
| Technical Specification | Value |
|---|---|
| Compound Number | NB70BK51 |
| Material | NBR (Nitrile, Buna-N) |
| Color | Black |
| Durometer | 70 Shore A Hardness |
| High Temperature | 135 °C / 275 °F |
| Low Temperature | -55 °C / -67 °F |
| Geometry Specifications | |
| Type | Ring Gasket |
| Size | 150#-2"-RN-1/4" |
| Pipe Size | 2 |
| ID | 60.45 mm / 2.380 in |
| OD | 104.65 mm / 4.120 in |
| Thickness | 1/4" |
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, Parker N0304-75 O-rings, Parker N304-75 nitrile seals, Parker N0304 gasket material, Parker N304 Buna-N O-rings, Parker N0304 low temperature gasket, Parker N0304 NBR compound
