Value Collection ZBD9984-17 O-ring Dash 139 Nbr

Product Description

The VALUE COLLECTION ZBD9984-17 is a Dash 139 O-ring made from Nitrile Butadiene Rubber (NBR), designed to create a reliable static or dynamic seal in fluid and pneumatic systems. It measures 2.1875 inches inner diameter, 2.38 inches outer diameter, and 0.0937 inches thick, with a round cross section. Rated to a hardness of 70 Shore A, this O-ring maintains its sealing integrity across a wide temperature range. HVAC technicians, plumbers, and mechanical contractors use NBR O-rings like this in hydraulic circuits, refrigerant-side fittings, water lines, and pneumatic assemblies where oil and petroleum fluid resistance is required.

This O-ring is suited for residential and commercial applications involving oil, fuel, water, and many hydraulic fluids. It performs reliably in systems where operating temperatures fall between -40 degrees F and 275 degrees F. Common installation scenarios include pump housings, valve bodies, pipe unions, manifold ports, and compressor fittings. It is sold individually, with a minimum order quantity of 25 units, making it appropriate for service fleets and shop stock replenishment.

Key Features

• NBR material offers strong resistance to petroleum-based oils, fuels, and hydraulic fluids
• Wide service temperature range: -40 degrees F to 275 degrees F
• 70 Shore A hardness rating suits both static and dynamic sealing applications
• Round cross section for consistent groove seating and predictable compression
• Dash 139 standard sizing ensures drop-in fitment in compatible grooves
• Lightweight at 0.01 pounds per unit, practical for bulk stocking

Compatibility

Designed as a standard Dash 139 replacement O-ring for use in any groove machined to AS568 Dash 139 dimensions accepting a 2.1875-inch ID NBR seal.

Installation Notes

O-ring installation should be performed by a qualified technician after fully depressurizing and de-energizing the system. Inspect the groove for burrs, scoring, or contamination before seating the new O-ring. Apply a compatible lubricant to the O-ring prior to installation to prevent tearing during assembly. Avoid rolling or twisting the O-ring into the groove, as this introduces stress and reduces service life.