Value Collection BDNA--9988-2 O-ring Dash 121 Nbr

Product Description

The VALUE COLLECTION BDNA--9988-2 is a Dash 121 O-ring manufactured from Nitrile Butadiene Rubber (NBR) with a round cross section. It measures 1-1/16 inches inside diameter and 3/32 inches thick, with a durometer rating of 70 Shore A. NBR compound provides reliable resistance to petroleum-based fluids, hydraulic oils, and fuels, making this O-ring a standard choice for sealing applications in HVAC, plumbing, and fluid-handling equipment. Licensed plumbers, HVAC technicians, and mechanical contractors install this type of O-ring as a static or dynamic seal in a wide range of service and repair tasks.

This O-ring is suited for use in residential and light commercial applications where an inch-series Dash 121 seal is specified. Typical installation scenarios include valve bodies, pump housings, fittings, and refrigeration service ports where a reliable low-pressure to medium-pressure fluid seal is required. The NBR material performs across a broad service temperature range, making it appropriate for both chilled-water and hot-water system components as well as general plumbing repair.

Key Features

• Dash 121 inch-series sizing — 1-1/16 inches inside diameter, 3/32 inches thick
• Nitrile Butadiene Rubber (NBR) construction for resistance to petroleum-based fluids and hydraulic oils
• Round cross section for consistent sealing contact and reliable compression
• 70 Shore A durometer for firm yet flexible sealing performance
• Inch system of measurement for direct compatibility with standard inch-series hardware

Compatibility

Designed as a standard inch-series Dash 121 O-ring replacement for valves, fittings, pump housings, and other fluid-handling components that specify a 1-1/16 inch ID, 3/32 inch thick NBR seal.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified mechanic. Always depressurize and isolate the system before removing or replacing O-rings. Inspect the seating groove for damage or debris before installing the new O-ring. Applying a light coat of compatible lubricant to the O-ring before installation helps prevent tearing and ensures proper seating.