Value Collection BDNA--9984-7 O-ring Dash 129 Nbr

Product Description

The VALUE COLLECTION BDNA--9984-7 is a Dash 129 O-ring used to create static or dynamic fluid seals in plumbing, HVAC, and mechanical systems. It is manufactured from Nitrile Butadiene Rubber (NBR) with a durometer hardness of 70, making it well suited for petroleum-based fluids, water, and many common refrigerants. The inside diameter measures 1-9/16 inches with a 3/32-inch cross-section thickness and a round cross-section profile. Plumbers, HVAC technicians, and industrial maintenance professionals install this ring as a compression seal at fittings, valves, caps, and ported connections.

This O-ring is sized to the standard Dash 129 designation within the inch measurement system. It is a common replacement seal for valves, pipe unions, ball valves, manifold ports, and service fittings found in residential and light commercial plumbing and HVAC equipment. NBR material provides solid resistance to oils and fuels in addition to water-based media, broadening its range of service applications across trades.

Key Features

• Dash 129 standard sizing for straightforward cross-reference and replacement
• 1-9/16 inches inside diameter with 3/32-inch round cross-section
• Nitrile Butadiene Rubber (NBR) construction for resistance to petroleum-based fluids and water
• 70 durometer hardness rating for reliable compression sealing
• Inch-system measurement for direct fitment to standard domestic components

Compatibility

Designed as an OEM-style replacement or service seal for plumbing, HVAC, and mechanical fittings requiring a standard Dash 129 inch-series O-ring.

Installation Notes

Shut off and depressurize the system before removing the existing seal. Inspect the O-ring groove for nicks, corrosion, or debris before seating the new ring. Apply a compatible O-ring lubricant to ease installation and reduce the risk of twisting or pinching the seal. This work is typically performed by a licensed plumber or HVAC technician in accordance with applicable IPC or IFGC guidelines.