Value Collection ZMSCHB90032 O-ring Nbr 90 Duro Dash 8-032

Product Description

The VALUE COLLECTION ZMSCHB90032 is a rectangular cross-section backup O-ring made from Nitrile Butadiene Rubber (NBR), rated at 90 durometer for extra-hard sealing performance. It measures 1.893 inches inside diameter, 2.000 inches outside diameter, and 0.047 inches thick. The rectangular cross section and high durometer rating make this a backup ring application component, used to prevent seal extrusion under pressure. It is suitable for hydraulic, pneumatic, plumbing, and fluid-handling assemblies across HVAC, industrial, and mechanical service applications. Licensed technicians and mechanical service professionals install these rings during seal replacement and valve service procedures.

This O-ring is suited for systems that operate across a wide temperature range, from -40 degrees F to 250 degrees F. The NBR material provides good resistance to oils, fuels, and water-based fluids, making it a practical choice for refrigerant-adjacent plumbing connections, hydraulic fittings, and general mechanical assemblies. Each package contains 50 rings, making it appropriate for shop stock or multi-unit service calls. The Dash 8-032 designation corresponds to a standardized size classification used across many OEM and aftermarket seal applications.

Key Features

• NBR (Nitrile Butadiene Rubber) construction resists oils, fuels, and water-based fluids
• 90 durometer extra-hard rating for backup ring and anti-extrusion use
• Rectangular cross section for precise fit in backup ring grooves
• Wide service temperature range: -40 degrees F to 250 degrees F
• Standardized Dash 8-032 sizing for broad fitment across OEM and aftermarket assemblies
• Packaged in quantities of 50 for shop stock or multi-unit service

Compatibility

Designed as a standard Dash 8-032 backup O-ring for hydraulic, pneumatic, plumbing, and fluid-handling assemblies requiring a rectangular-cross-section NBR seal at this dimensional specification.

Installation Notes

Installation should be performed by a qualified mechanic or service technician familiar with hydraulic or pneumatic seal replacement. De-pressurize and isolate the system fully before opening any fitting or valve. Avoid rolling or twisting the ring during installation to prevent stress cracking. Inspect the mating groove for burrs or contamination before seating the ring.