Value Collection ZMSCH70045 O-ring Dash 045 Nitrile 4 in Id

Product Description

The VALUE COLLECTION ZMSCH70045 is a Dash 045 O-ring manufactured from Buna-N nitrile butadiene rubber, one of the most widely used elastomers in fluid sealing applications. It features a round cross-section measuring 4 inches inside diameter, 4.125 inches outside diameter, and 0.0625 inches thick. Rated at 70 Shore A hardness, this O-ring delivers excellent resistance to petroleum-based fluids, strong compression set characteristics, and solid tear and abrasion resistance. It is suitable for service across a temperature range of -40 degrees F to 250 degrees F. HVAC technicians, plumbers, and mechanical contractors rely on this seal type in a wide range of fluid system assemblies.

This O-ring is suited for use in hydraulic systems, pneumatic circuits, and plumbing assemblies where petroleum-based fluids or oils are present. Its Buna-N construction makes it a standard choice in residential and light commercial HVAC equipment, pump housings, valve bodies, and pipe fittings that handle petroleum products or mineral oils. It is not recommended for use with ozone-generating environments, direct sunlight exposure, or in proximity to electric motors that may produce ozone.

Key Features

• Buna-N nitrile rubber construction offers excellent resistance to petroleum products and mineral oils
• 70 Shore A hardness rating provides reliable sealing under compression in standard mechanical assemblies
• Wide service temperature range from -40 degrees F to 250 degrees F suits diverse HVAC and plumbing applications
• Round cross-section profile for consistent sealing contact in standard O-ring grooves
• Meets SAE and MIL-Spec standards for material and dimensional performance
• Sold in a package quantity of 50 units per order

Compatibility

Designed as a standard Dash 045 O-ring replacement for mechanical assemblies requiring a 4-inch ID nitrile seal compatible with petroleum-based fluids and hydraulic media.

Installation Notes

Installation of O-rings should be performed by qualified HVAC technicians, plumbers, or pipefitters following system manufacturer guidelines. Always depressurize and shut down the system fully before removing or replacing any sealing components. Avoid twisting or rolling the O-ring during installation, as this can compromise the sealing surface. Do not store Buna-N O-rings near direct sunlight, ozone sources, or electrical motors prior to installation, as these conditions degrade the elastomer.