Value Collection BDNA--9994-4 O-ring Dash 331 Nbr

Product Description

The VALUE COLLECTION BDNA--9994-4 is a Dash 331 O-ring used to create a static or dynamic fluid seal in hydraulic, pneumatic, plumbing, and mechanical assemblies. It features a 2-1/4 inch inside diameter and a 3/16 inch round cross section, sized to the Dash 331 standard. The material is Nitrile Butadiene Rubber (NBR) with a 70 durometer hardness rating, providing good resistance to petroleum-based fluids, oils, and greases. Plumbers, HVAC technicians, and mechanical service professionals use this O-ring as a replacement or service seal wherever a Dash 331 NBR ring is specified.

This O-ring is suited for residential and commercial applications involving oil, fuel, water, and general hydraulic fluid service. Common install scenarios include pump housings, valve bodies, fittings, and piping connections that call for an inch-series Dash 331 seal. The 70 durometer NBR compound performs across a broad range of service temperatures and holds up well in contact with petroleum-based media, making it a standard choice for HVAC refrigerant-adjacent seals, fuel systems, and general plumbing maintenance.

Key Features

• Dash 331 inch-series sizing: 2-1/4 inches inside diameter, 3/16 inches cross section thickness
• Nitrile Butadiene Rubber (NBR) construction resists petroleum-based fluids, oils, and fuels
• 70 durometer hardness provides a firm, reliable seal under compression
• Round cross section geometry ensures consistent radial seal contact
• Inch system of measurement — drop-in fit wherever a Dash 331 O-ring is called out

Compatibility

Designed as a standard inch-series Dash 331 replacement O-ring for use in hydraulic, pneumatic, plumbing, and HVAC assemblies that specify a 2-1/4 inch ID, 3/16 inch cross section NBR seal.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or mechanical service professionals. Depressurize and drain the system fully before removing the existing O-ring to prevent fluid release and injury. Lightly lubricate the new O-ring with a compatible fluid or O-ring lubricant before seating it to avoid tearing during assembly. Inspect the groove for nicks, burrs, or corrosion before installing the replacement seal.