NM304-75 Datasheet

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.

 

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