Image shown is representative and may differ from the actual product in size, proportions, and color shade
0.472 in
(12.00 mm)
17.638 in
(448.00 mm)
NBR Parker NM304-75 O-Ring, Size: 12X448
Material: NBR Parker NM304-75 O-Ring
Size: Metric 12X448 O-Ring
Part Number: NM304-75-OR-12X448
Color: Black
Detailed Description
NM304-75-OR-12X448 is a Black, 75 Shore A, NBR (Nitrile, Buna-N) O-Ring made from Parker Seal® (Parker). It is a 75 durometer NBR (Nitrile, Buna-N). NM304-75-OR-12X448 is Metric size 12X448 O-Ring also referred to as 12mm (Cross Sectional Diameter (CS)) x 448mm (Inside Diameter (ID)). Material: 75 Durometer NBR Parker NM304-75 O-Ring Size: Metric 12X448, 12mm CS X 448mm ID (0.472" CS X 17.638" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | NM304-75 |
| Brand | Parker Seal® (Parker) |
| Material | NBR (Nitrile, Buna-N) |
| Color | Black |
| Durometer | 75 Shore A Hardness |
| High Temperature | 107 °C / 225 °F |
| Low Temperature | -54 °C / -65 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | Metric |
| Size | 12X448 |
| Cross Section (CS) | 12.00 mm / 0.472 in |
| Inside Diameter (ID) | 448.00 mm / 17.638 in |
Parker’s NM304-75 is a 75 Shore A black nitrile rubber (NBR) compound qualified to MIL-DTL-25732 for oil-resistant sealing applications requiring dependable mechanical strength and stability. This material provides good abrasion resistance and low compression set, supporting reliable long-term performance in O-rings and gaskets used in static and light dynamic service. With a service temperature range of -65°F to 225°F (-54°C to 107°C), NM304-75 maintains elasticity and sealing force across temperature cycling while performing well in contact with petroleum-based oils and common industrial fluids. Its mid-high durometer offers improved extrusion resistance compared to softer nitrile grades, making it suitable for higher clamp loads.
NM304-75 is commonly specified for military, aerospace-adjacent, and industrial applications where MIL qualification and consistent nitrile performance are required at a cost-effective level. This compound is selected when durability, oil resistance, and compliance are priorities without transitioning to specialty elastomers. Canyon Components offers equivalent NBR materials that match or exceed the performance of Parker NM304-75 for MIL-DTL-25732 compliant O-rings and gaskets across a wide range of sealing applications.
Common relevant keywords:
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