Value Collection ZMSCH70230 O-ring Dash 230 Nbr Pack of 50

Product Description

The VALUE COLLECTION ZMSCH70230 is a Dash 230 Nitrile Butadiene Rubber (NBR/Buna-N) O-ring designed for static and dynamic sealing applications in fluid and pneumatic systems. It measures 2.5 inches inside diameter, 2.75 inches outside diameter, and 0.125 inches thick with a round cross section. Rated at 70 Shore A hardness, this O-ring handles a working temperature range of -40 degrees F to 250 degrees F and offers reliable resistance to petroleum-based fluids. HVAC technicians, plumbers, and hydraulic system service professionals regularly specify Buna-N O-rings for their broad compatibility with petroleum products and proven compression-set performance. Sold in a package quantity of 50.

This O-ring is suited for residential and commercial sealing applications where petroleum-based lubricants, fuels, or hydraulic fluids are present. Common install scenarios include pump housings, valve bodies, pipe fittings, manifold assemblies, and hydraulic couplings. The Dash 230 designation follows the AS568 standard sizing series, making it straightforward to cross-reference for replacement in existing assemblies. The Buna-N compound is the most widely used O-ring elastomer in trade service work and is an appropriate general-purpose choice where nitrile-compatible media are confirmed.

Key Features

• Buna-N (NBR) compound offers excellent resistance to petroleum-based products including oils, fuels, and hydraulic fluids
• 70 Shore A hardness rating provides a firm, reliable seal with good compression set resistance
• Operating temperature range of -40 degrees F to 250 degrees F suits most HVAC, plumbing, and hydraulic service environments
• Round cross section and Dash 230 sizing for straightforward drop-in replacement in AS568-dimensioned grooves
• Meets SAE and MIL-Spec standards for sealing applications
• Packaged in quantities of 50, suitable for shop stock or recurring service work

Compatibility

Compatible with petroleum products including oils, fuels, and hydraulic fluids. Not recommended for use with ozone-generating environments, direct sunlight storage, or media incompatible with nitrile rubber. Conforms to SAE and MIL-Spec standards for O-ring sealing applications. Not FDA approved.

Installation Notes

Depressurize and isolate the system before removing or installing any O-ring seals. Clean the groove and mating surfaces thoroughly before seating the new O-ring to prevent pinching or extrusion. Lubricate with a compatible petroleum-based or nitrile-safe grease during assembly to ease installation and extend seal life. Do not store unused O-rings in direct sunlight or near motors or other electrical equipment that may generate ozone, as this can degrade the NBR compound prematurely.