Value Collection BDNA-MP9979 O-ring Dash 111 Nbr

Product Description

The VALUE COLLECTION BDNA-MP9979 is a Dash 111 O-ring manufactured from Nitrile Butadiene Rubber (NBR) with a round cross section. It measures 7/16 inches inside diameter and 3/32 inches thick, with a durometer rating of 70 Shore A. NBR compound provides reliable resistance to petroleum-based oils, fuels, and hydraulic fluids, making this O-ring a dependable sealing element in fluid-handling systems. Licensed plumbers, HVAC technicians, and general maintenance professionals install this type of O-ring in valves, fittings, pumps, and related assemblies where a positive static or low-motion seal is required.

This O-ring is suited for residential and light commercial plumbing, HVAC refrigerant-side components, and hydraulic or pneumatic fittings that operate within the service temperature and pressure range of standard NBR compounds. The Dash 111 designation follows the AS568 standard sizing series, allowing straightforward cross-reference to OEM groove specifications. Typical applications include valve stems, union fittings, pump housings, and service port caps where a 7/16-inch ID seal groove is specified.

Key Features

• Dash 111 AS568 standard designation for consistent groove compatibility
• 7/16 inch inside diameter with 3/32 inch cross-section thickness
• Round cross section for uniform seating and even compression
• Nitrile Butadiene Rubber (NBR) material resists petroleum oils, fuels, and hydraulic fluids
• 70 Shore A durometer provides a firm yet compressible seal
• Inch system of measurement for direct use with standard US fittings and groove dimensions

Compatibility

Designed as a standard Dash 111 replacement O-ring for any valve, fitting, pump, or assembly specifying a 7/16-inch ID, 3/32-inch thick NBR O-ring in an inch-measurement groove.

Installation Notes

Always depressurize and drain the system before removing or installing O-rings. Inspect the mating groove and sealing surfaces for scoring or contamination before fitting the new O-ring. Apply a thin film of compatible lubricant to the O-ring prior to installation to reduce the risk of tearing during assembly. Do not use petroleum-based lubricants with non-NBR compounds, and verify chemical compatibility with the system fluid before installing.