Value Collection BDNA--9991-3 O-ring Dash 219 Nbr

Product Description

The VALUE COLLECTION BDNA--9991-3 is a Dash 219 O-ring designed to create a reliable static or dynamic seal in fluid and pneumatic systems. Manufactured from Nitrile Butadiene Rubber (NBR) with a 70 durometer hardness rating, it offers solid resistance to oils, fuels, and hydraulic fluids commonly found in HVAC, plumbing, and mechanical systems. The ring measures 1-5/16 inches inside diameter with a 1/8 inch cross-section thickness and features a round cross-section profile. Licensed tradespeople and maintenance technicians use this O-ring as a direct replacement or service part when resealing valves, fittings, pumps, and fluid connectors.

This O-ring is suited for residential and light commercial applications involving oil-based or water-based hydraulic circuits, refrigeration service valves, plumbing shut-off valves, and compressed air fittings. The Dash 219 designation corresponds to a standard AS568 dimension, making it a recognized size across a wide range of OEM and aftermarket equipment. It is sold individually with a minimum order quantity of 25 units, making it practical for shop stock or service van inventory.

Key Features

• Dash 219 standard AS568 size — 1-5/16 inch ID with 1/8 inch thickness
• Nitrile Butadiene Rubber (NBR) construction resists oils, hydraulic fluids, and fuels
• 70 durometer hardness provides a firm, reliable seal under pressure
• Round cross-section profile for consistent seating in standard O-ring grooves
• Inch-system dimensioning for compatibility with standard imperial hardware

Compatibility

Designed as a standard Dash 219 replacement O-ring for use in imperial-dimensioned valves, fittings, pumps, and fluid system components that accept a 1-5/16 inch ID, 1/8 inch cross-section NBR seal.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or mechanical service technicians. Always depressurize and de-energize the system before removing the old O-ring and inspect the groove for scoring or debris before seating the replacement. Apply a light coat of compatible lubricant to the O-ring before installation to prevent tearing during assembly. Avoid over-stretching the ring during installation, as permanent deformation will compromise the seal.