Value Collection BDNA-MP9991-2 O-ring Dash 218 Nbr

Product Description

The VALUE COLLECTION BDNA-MP9991-2 is a Dash 218 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N) with a round cross section. It measures 1-1/4 inches inside diameter and 1/8 inch thick. Buna-N is a standard elastomer choice for hydraulic, pneumatic, and fluid-handling applications where resistance to petroleum-based oils, fuels, and water is required. This O-ring is used as a static or dynamic face seal or radial seal and is sized to the Dash 218 standard, making it straightforward to cross-reference and replace in the field. Plumbers, HVAC technicians, and industrial maintenance professionals commonly stock Dash 218 rings for routine seal replacement tasks.

This O-ring is suited for residential and light commercial plumbing, HVAC refrigerant-side connections, hydraulic fittings, and general industrial fluid systems where a 1-1/4 inch ID seal is required. Its Buna-N construction performs well across a broad range of petroleum oils, water, and many glycol-based fluids. It is not recommended for use with ketones, esters, or strong oxidizing acids. This item is sold individually with a minimum order quantity of 10 units, making it practical for service kits or bulk restocking.

Key Features

• Dash 218 standard sizing for easy cross-reference and field replacement
• 1-1/4 inch inside diameter with 1/8 inch cross-section thickness
• Buna-N (Nitrile Butadiene Rubber) material resists petroleum oils, fuels, and water
• Round cross section for consistent sealing performance in standard grooves
• Lightweight at 0.01 pounds per unit, suitable for kit and bulk stocking

Compatibility

Designed as a standard Dash 218 replacement O-ring for plumbing, HVAC, hydraulic, and pneumatic fittings and assemblies that require a 1-1/4 inch ID, 1/8 inch thick Buna-N seal.

Installation Notes

Installation should be performed by a licensed plumber, HVAC technician, or qualified maintenance professional. Always depressurize and de-energize the system and drain any fluid from the line before removing the old seal. Inspect the groove for nicks, burrs, or corrosion before seating the new O-ring. Apply a compatible lubricant to the O-ring prior to installation to reduce the risk of tearing during assembly.