Value Collection ZBD9993-19 O-ring Dash 246 Nbr

Product Description

The VALUE COLLECTION ZBD9993-19 is a Dash 246 O-ring made from Nitrile Butadiene Rubber (NBR), designed for static and dynamic sealing applications in fluid and pneumatic systems. It measures 4.5 inches inside diameter with a 4.75 inches outside diameter and a 0.125 inch cross-section thickness. The round cross-section profile seats reliably in standard AN/MS dash 246 grooves. With a Shore A hardness of 70 and a working temperature range of -40 degrees F to 275 degrees F, this O-ring handles the thermal and pressure cycling common in HVAC, plumbing, and hydraulic service environments. Licensed trades and maintenance technicians use this part for pump seals, valve packing, and fitting connections.

This O-ring is suited for residential and commercial applications where a standard Dash 246 NBR seal is required. Typical install scenarios include circulator pump housings, ball valve assemblies, hydraulic cylinder end caps, and refrigeration service port fittings. NBR compound provides solid resistance to petroleum-based oils, hydraulic fluids, water, and many common refrigerants, making it a practical choice across HVAC, plumbing, and light industrial service calls. It is sold individually, with a minimum order quantity of 10 units.

Key Features

• Dash 246 standard sizing: 4.5 inches ID, 4.75 inches OD, 0.125 inches thick — fits AN/MS Dash 246 groove dimensions
• Nitrile Butadiene Rubber (NBR) compound resists petroleum-based oils, hydraulic fluids, and water
• Operating temperature range of -40 degrees F to 275 degrees F suits a wide range of heating and cooling system service conditions
• Shore A hardness rating of 70 provides a firm, reliable seat in standard O-ring grooves
• Round cross-section profile for consistent compression and sealing contact

Compatibility

Designed as a standard Dash 246 replacement O-ring for any system or component that specifies a Dash 246 NBR seal in an AN/MS standard groove.

Installation Notes

O-ring replacement is performed by licensed plumbers, HVAC technicians, and hydraulic system technicians. Depressurize and drain or recover fluid from the system before removing the old seal. Lightly lubricate the new O-ring with a compatible lubricant prior to installation to prevent tearing during assembly. Do not roll or twist the O-ring into the groove; seat it evenly around the full circumference before torquing fasteners.