Value Collection BDNA--9993-9 O-ring Dash 236 Nbr

Product Description

The VALUE COLLECTION BDNA--9993-9 is a Dash 236 O-ring manufactured from Nitrile Butadiene Rubber (NBR) with a round cross section. It measures 3.25 inches inside diameter and 0.125 inches in thickness, with a durometer rating of 70 Shore A. NBR compounds perform reliably in the presence of petroleum-based oils, hydraulic fluids, and fuels, making this O-ring a dependable sealing solution for a wide range of mechanical and fluid system applications. Licensed plumbers, HVAC technicians, and mechanical contractors rely on standard Dash-numbered O-rings like this one for quick, accurate replacement sourcing across fittings, valves, pumps, and connectors.

This O-ring is suited for static and low-speed dynamic sealing applications in residential and light commercial systems. Typical installation scenarios include sealing threaded or flanged connections in plumbing assemblies, HVAC refrigerant or water-side components, pool and spa equipment fittings, and hydraulic or pneumatic system interfaces where NBR compatibility with the process fluid has been confirmed. The 70 durometer hardness provides a balance of flexibility and compression resistance appropriate for standard groove-and-gland sealing applications.

Key Features

• Dash 236 standard sizing for direct cross-reference with OEM and aftermarket specifications
• 3.25 inches inside diameter with 0.125 inches round cross section
• Nitrile Butadiene Rubber (NBR) material — resistant to petroleum oils, hydraulic fluids, and water
• 70 Shore A durometer for reliable compression sealing in standard gland geometries
• Round cross section for consistent seating in standard O-ring grooves

Compatibility

Designed as a standard Dash 236 O-ring replacement suitable for any application requiring a 3.25-inch ID, 0.125-inch thick NBR O-ring where the process fluid is compatible with Nitrile Butadiene Rubber.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified mechanical technicians. Before replacing an O-ring, depressurize the system and isolate the section being serviced according to applicable IPC or IFGC guidelines. Inspect the mating groove for wear, debris, or damage before seating the new O-ring. Lubricate with a fluid-compatible grease or lubricant to prevent tearing during assembly — never use petroleum-based lubricants on seals that will contact incompatible fluids.