Value Collection BDNA--9993-16 O-ring Dash 243 Nbr

Product Description

The VALUE COLLECTION BDNA--9993-16 is a Dash 243 O-ring manufactured from Nitrile Butadiene Rubber (NBR) with a round cross section. It measures 4.125 inches inside diameter and 0.125 inches in thickness, with a durometer hardness of 70. NBR compounds offer solid resistance to petroleum-based fluids, oils, and fuels, making this O-ring well suited for sealing applications in plumbing, HVAC, and fluid-handling systems. Licensed tradespeople and maintenance technicians working on pumps, valves, fittings, and hydraulic or pneumatic assemblies will find this a standard replacement seal.

This O-ring is appropriate for use in residential and light commercial applications where an inch-system Dash 243 seal is specified. Typical install scenarios include pump housings, pipe unions, valve bodies, and refrigeration service fittings that require a proven NBR sealing element. It is sold individually but carries a minimum order quantity of 25 units, making it practical for service fleets or shops stocking common seal sizes.

Key Features

• Dash 243 standard sizing — 4.125 inches ID, 0.125 inches thick
• Nitrile Butadiene Rubber (NBR) construction resists petroleum oils, fuels, and hydraulic fluids
• Round cross section for consistent compression and sealing across standard grooves
• 70 durometer hardness balances flexibility and extrusion resistance
• Inch-system measurement for direct fitment into standard Dash 243 groove dimensions

Compatibility

Designed as a standard Dash 243 replacement O-ring for any inch-system application requiring a 4.125-inch ID, 0.125-inch cross-section NBR seal in pumps, valves, pipe fittings, or fluid-handling assemblies.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or qualified maintenance personnel. Always depressurize and isolate the system before removing the existing seal and installing the replacement O-ring. Lightly lubricate the O-ring with a compatible fluid or grease before seating it in the groove to prevent tearing during assembly. Avoid overstretching the ring during installation, as this can compromise the sealing surface.