NBR NB40BK00 O-Ring, Size: -212
Material: NBR NB40BK00 O-Ring
Size: AS568 -212 O-Ring
Part Number: NB40BK00-OR-212
Color: Black
Detailed Description
NB40BK00-OR-212 is a Black, 40 Shore A, Sulfur Cured NBR (Nitrile, Buna-N) O-Ring. It is a 40 durometer NBR (Nitrile, Buna-N). NB40BK00 is manufactured with the following features & specifications: General Purpose Material. NB40BK00-OR-212 is AS568 size -212 O-Ring also referred to as 3.53mm (Cross Sectional Diameter (CS)) x 21.82mm (Inside Diameter (ID)).
Material: 40 Durometer NBR NB40BK00 O-Ring
Size: AS568 -212, 3.53mm CS X 21.82mm ID (0.139" CS X 0.859" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | NB40BK00 |
| Material | NBR (Nitrile, Buna-N) |
| Cure | Sulfur Cured |
| Color | Black |
| Durometer | 40 Shore A Hardness |
| High Temperature | 125 °C / 257 °F |
| Low Temperature | -35 °C / -31 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -212 |
| Cross Section (CS) | 3.53 mm / 0.139 in |
| Inside Diameter (ID) | 21.82 mm / 0.859 in |
NB40BK00 is Canyon’s standard 40 Shore A black nitrile rubber (NBR) compound developed for general-purpose sealing where flexibility, oil resistance, and cost efficiency are important. This low-durometer material provides good abrasion resistance and low compression set, supporting reliable sealing performance in O-rings and gaskets used under light loads. With a service temperature range of -35°C to 122°C (-31°F to 252°F), NB40BK00 maintains elasticity in cooler conditions while remaining stable in contact with petroleum-based oils. It is commonly selected for static and light dynamic applications that benefit from improved conformability to gland surfaces. Compare to Parker N0545-40 for similar low-durometer nitrile performance.
NB40BK00 meets ASTM D2000 M2BG407 requirements and is suitable for pumps, valves, and general industrial equipment where a softer NBR is preferred. The compound’s balance of flexibility and durability helps reduce installation damage and supports consistent sealing over time. Canyon Components offers this material as a cost-effective alternative for applications requiring soft nitrile O-rings and gaskets without specialty chemical resistance.
Common relevant keywords:
40 Shore A NBR, soft nitrile O-rings, low durometer nitrile gaskets, general purpose NBR rubber, oil resistant sealing materials, flexible nitrile elastomer, ASTM D2000 NBR compound, industrial rubber seals, Parker N0545-40 alternative, Datasheet, TDS, Test Report, MTR, MSDS, SDS, Parker N0545-40 O-rings, Parker N545-40 nitrile seals, Parker N0545 gasket material, Parker N545 Buna-N O-rings, Parker N0545 AMS 3201 gasket, Parker N0545 low hardness NBR compound
