Image shown is representative and may differ from the actual product in size, proportions, and color shade
5.560 in
(141.22 mm)
11.000 in
(279.40 mm)
8
0.880 in
(22.35 mm)
9.250 in
(234.95 mm)
1/2"
NBR Parker NA155-80 Full Face Gasket, Size: 300#-5"-FF-1/2"
Material: NBR Parker NA155-80 Full Face Gasket
Size: 300#-5"-FF-1/2" Full Face Gasket
Part Number: NA155-80-300#-5"-FF-1/2"
Color: Black
Detailed Description
NA155-80-300#-5"-FF-1/2" is a Black, 80 Shore A, NBR (Nitrile, Buna-N) Full Face Gasket made from Parker Seal® (Parker). It is a 80 durometer NBR (Nitrile, Buna-N). [Parker Seal® (Parker) NA155-80 is manufactured with the following features & specifications: General Purpose Material. NA155-80-300#-5"-FF-1/2" is a size 5, 300#-FF ASME Full Face Gasket. Material: 80 Durometer NBR Parker NA155-80 Full Face Gasket Size: 300#-5"-FF-1/2", 5 Pipe Size X 141.22mm ID X 279.4mm OD X 8 Bolt Qty X 22.350mm Bolt Dia. X 234.950mm Bolt Circle X 1/2" Thickness
| Technical Specification | Value |
|---|---|
| Compound Number | NA155-80 |
| Brand | Parker Seal® (Parker) |
| Material | NBR (Nitrile, Buna-N) |
| Color | Black |
| Durometer | 80 Shore A Hardness |
| High Temperature | 121 °C / 250 °F |
| Low Temperature | -32 °C / -26 °F |
| Geometry Specifications | |
| Type | Full Face Gasket |
| Size | 300#-5"-FF-1/2" |
| Pipe Size | 5 |
| ID | 141.22 mm / 5.560 in |
| OD | 279.40 mm / 11.000 in |
| Bolt Qty | 8 |
| Bolt Dia. | 22.35 mm / 0.880 in |
| Bolt Circle | 234.95 mm / 9.250 in |
| Thickness | 1/2" |
Parker’s NA155-80 is an 80 Shore A black nitrile rubber (NBR) compound designed as a general-purpose sealing material for industrial and fluid-handling applications. Operating across a service temperature range of -25°F to 250°F, it provides dependable sealing performance with good compression set resistance and mechanical stability under load. This 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 hydraulic and general machinery uses. Its higher durometer improves extrusion resistance compared to softer nitrile grades, supporting reliable performance in static and moderate dynamic O-rings and gaskets.
NA155-80 is commonly used in pumps, valves, cylinders, and industrial equipment where cost-effective oil resistance and durability are required. It is not recommended for aromatic fuels, strong acids, glycols, ozone exposure, or polar solvents. This material offers a practical balance of hardness, oil compatibility, and temperature capability for everyday sealing needs. Canyon Components offers equivalent NBR materials engineered to match the hardness, temperature range, and general-purpose performance of Parker NA155-80.
Common relevant keywords:
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