Value Collection ZBD9993-11 O-ring Nbr Dash 238

Product Description

The VALUE COLLECTION ZBD9993-11 is a Dash 238 O-ring machined from nitrile butadiene rubber (NBR) with a round cross section. It measures 3.5 inches inside diameter, 3.75 inches outside diameter, and 0.125 inches thick. NBR compound delivers reliable resistance to petroleum-based fluids, hydraulic oils, and fuels, making this O-ring a dependable sealing solution in demanding fluid-system applications. The 70-durometer hardness rating provides a firm, consistent seal under pressure. Licensed tradespeople working on fluid handling, pneumatic, and hydraulic systems will find this a straightforward replacement or maintenance sealing component.

This O-ring is suited for use in residential and commercial plumbing, HVAC refrigerant-adjacent assemblies, hydraulic systems, pneumatic fittings, and general industrial fluid connections where an NBR compound and Dash 238 sizing are specified. Its temperature range of -40 degrees F to 275 degrees F covers a wide range of operating environments encountered in trade service work. It is sold individually with a minimum order quantity of 25 units.

Key Features

• Nitrile butadiene rubber (NBR) construction resists petroleum oils, hydraulic fluids, and fuels
• Dash 238 standard sizing for straightforward cross-reference and replacement sourcing
• Round cross section ensures even seating and consistent radial compression in grooves
• 70 Shore A hardness rating provides firm seal performance classified as Hard
• Operating temperature range of -40 degrees F to 275 degrees F suits a broad range of service conditions
• Compact 0.125-inch wall thickness fits standard Dash 238 groove dimensions

Compatibility

Designed as a standard Dash 238 O-ring replacement for any application specifying a 3.5-inch ID, 3.75-inch OD, 0.125-inch thick NBR sealing ring.

Installation Notes

Shut down and depressurize the system fully before removing the old O-ring. Inspect the groove for scoring or debris that could compromise the new seal. A light application of compatible lubricant aids seating without damaging the NBR compound. Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic system mechanics following applicable service codes.