Image shown is representative and may differ from the actual product in size, proportions, and color shade
4.500 in
(114.30 mm)
10.000 in
(254.00 mm)
8
0.880 in
(22.35 mm)
7.880 in
(200.15 mm)
1/2"
NBR NB40BK00 Full Face Gasket, Size: 300#-4"-FF-1/2"
Material: NBR NB40BK00 Full Face Gasket
Size: 300#-4"-FF-1/2" Full Face Gasket
Part Number: NB40BK00-300#-4"-FF-1/2"
Color: Black
Detailed Description
NB40BK00-300#-4"-FF-1/2" is a Black, 40 Shore A, Sulfur Cured NBR (Nitrile, Buna-N) Full Face Gasket. It is a 40 durometer NBR (Nitrile, Buna-N). [NB40BK00 is manufactured with the following features & specifications: General Purpose Material. NB40BK00-300#-4"-FF-1/2" is a size 4, 300#-FF ASME Full Face Gasket. Material: 40 Durometer NBR NB40BK00 Full Face Gasket Size: 300#-4"-FF-1/2", 4 Pipe Size X 114.3mm ID X 254mm OD X 8 Bolt Qty X 22.350mm Bolt Dia. X 200.150mm Bolt Circle X 1/2" Thickness
| 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 | |
| Type | Full Face Gasket |
| Size | 300#-4"-FF-1/2" |
| Pipe Size | 4 |
| ID | 114.30 mm / 4.500 in |
| OD | 254.00 mm / 10.000 in |
| Bolt Qty | 8 |
| Bolt Dia. | 22.35 mm / 0.880 in |
| Bolt Circle | 200.15 mm / 7.880 in |
| Thickness | 1/2" |
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
