Value Collection ZBD9977-5X O-ring Dash 021 Nbr

Product Description

The VALUE COLLECTION ZBD9977-5X is a Dash 021 O-ring manufactured from Nitrile Butadiene Rubber (NBR) with a round cross section. It measures 15/16 inches inner diameter, 1-1/16 inches outer diameter, and 1/16 inches thick (0.0625 inches). With a Shore A hardness of 70 and a working temperature range of -40 degrees F to 275 degrees F, this O-ring suits a wide range of fluid sealing applications across HVAC, plumbing, and hydraulic systems. Licensed tradespeople and maintenance technicians use this standard Dash 021 profile as a static or dynamic seal in fittings, valves, and manifolds where petroleum-based fluid resistance is required.

This O-ring is appropriate for use in residential and light commercial HVAC equipment, refrigeration fittings, plumbing valve assemblies, and hydraulic or pneumatic systems where NBR compound performance is specified. Its temperature tolerance makes it suitable for both heating-side and cooling-side applications. The round cross section profile conforms to standard O-ring groove dimensions for Dash 021 designations, simplifying sourcing and replacement during routine service calls or equipment rebuilds.

Key Features

• Dash 021 standard sizing: 15/16 inches ID, 1-1/16 inches OD, 1/16 inches thick
• Nitrile Butadiene Rubber construction provides resistance to petroleum-based oils and fuels
• Shore A hardness of 70 rated Hard for positive groove seating
• Operating temperature range of -40 degrees F to 275 degrees F
• Round cross section for compatibility with standard Dash 021 O-ring grooves
• Lightweight at 0.01 pounds per unit

Compatibility

Designed as a standard Dash 021 O-ring replacement for use in valves, fittings, and fluid system components that specify NBR compound and round cross section seals.

Installation Notes

Installation should be performed by a qualified technician familiar with the system being serviced. Always depressurize and isolate the system before removing any fittings or valves containing O-rings. Inspect the groove for burrs or corrosion before seating the new O-ring, and apply a compatible lubricant to ease installation without stretching or twisting the ring. Do not install NBR O-rings in systems using synthetic ester lubricants or other fluids incompatible with Nitrile Butadiene Rubber.