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The VALUE COLLECTION BDNA-MP9991 is a Dash 216 O-ring with a round cross section, manufactured from Nitrile Butadiene Rubber (Buna-N). It features a 1-1/8 inch inside diameter and a 1/8 inch wall thickness. Buna-N material provides solid resistance to petroleum-based fluids, making this O-ring a dependable sealing solution for hydraulic, pneumatic, and fluid-handling assemblies. Plumbers, HVAC technicians, and industrial maintenance professionals routinely use this grade of O-ring for static and low-dynamic sealing applications where oil and fuel resistance is required.
This O-ring is suited for use in residential and light commercial plumbing systems, HVAC refrigerant circuits, hydraulic fittings, and general fluid-handling equipment where a Dash 216 profile is specified. The round cross section allows it to seat predictably in standard O-ring grooves machined to Dash 216 tolerances. It is sold individually, with a minimum order quantity of 10 units per order.
Designed as a Dash 216 O-ring replacement for applications requiring a 1-1/8 inch inside diameter and 1/8 inch thickness in Buna-N material. Verify groove dimensions against Dash 216 tolerances before installation.
Installation should be performed by a licensed plumber, HVAC technician, or qualified maintenance professional. Depressurize and drain the system fully before removing or replacing any O-ring. Lubricate the O-ring lightly with a compatible, fluid-safe lubricant before seating to prevent tearing during assembly. Do not roll or twist the O-ring into the groove; press it in evenly around the full circumference.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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