Value Collection ZMSCH70142 O-ring Dash 142 Nbr 70 Duro 50-pack

Product Description

The VALUE COLLECTION ZMSCH70142 is a Dash 142 Buna-N (Nitrile Butadiene Rubber) O-ring with a 2.375-inch inside diameter, 2.563-inch outside diameter, and a 3/32-inch (0.0937-inch) round cross section. Rated at 70 Shore A hardness, it provides firm sealing force under compression with excellent resistance to petroleum-based fluids. Operating temperature range spans -40 degrees F to 250 degrees F, making it suitable for a broad range of fluid-handling and mechanical sealing applications. Licensed HVAC techs, plumbers, and industrial mechanics reach for this elastomer first when sealing oil, fuel, or hydraulic connections. Sold in a pack of 50 units.

Buna-N is the most widely used O-ring elastomer in the trade. This Dash 142 size appears in residential and light commercial HVAC equipment, refrigeration systems, plumbing valves, hydraulic fittings, fuel-system components, and general industrial assemblies wherever a reliable static or dynamic face seal or radial seal is needed against petroleum-based media. The black color and standard SAE and MIL-Spec dimensional compliance make it a straightforward drop-in for maintenance, repair, and overhaul work across a wide range of equipment types.

Key Features

• Buna-N (Nitrile Butadiene Rubber) material offers excellent resistance to petroleum products, oils, and fuels
• 70 Shore A durometer (Hard rating) delivers reliable compression set and sealing force
• Round cross section; 0.0937-inch (3/32-inch) thickness conforms to standard Dash 142 dimensions
• Temperature range of -40 degrees F to 250 degrees F suits most HVAC, plumbing, and hydraulic service environments
• Meets SAE and MIL-Spec dimensional standards for broad equipment compatibility
• Pack of 50 supports fleet service, shop stock, and high-volume MRO replenishment

Compatibility

Designed as a standard Dash 142 O-ring replacement compatible with petroleum-based fluid systems; not compatible with ozone-generating environments, direct sunlight storage, or applications requiring FDA-approved elastomers.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or industrial mechanics. Always depressurize and evacuate the system and remove residual fluid before replacing seals. Lightly lubricate the O-ring with a compatible oil or grease prior to installation to prevent rolling or pinching in the groove. Do not store unused O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade Buna-N over time.