Value Collection ZMSCHB90115 Nbr O-ring Dash 8-115

Product Description

The VALUE COLLECTION ZMSCHB90115 is a rectangular cross-section backup O-ring manufactured from Nitrile Butadiene Rubber (NBR). It measures 0.702 inches inside diameter, 0.875 inches outside diameter, and 0.045 inches thick. Rated at 90 durometer (extra hard), this ring is suited for high-pressure sealing applications where standard O-rings need backup support to prevent extrusion. Its NBR compound handles a working temperature range of -40 to 250 degrees F, making it appropriate for hydraulic, pneumatic, and fluid-handling systems. Licensed tradespeople and maintenance technicians working on industrial or commercial equipment typically install this component during seal kit rebuilds or preventive maintenance.

This backup ring fits Dash 8-115 groove geometry and is used in systems requiring a rectangular-profile seal to prevent elastomeric O-ring extrusion under elevated pressure. Typical applications include hydraulic cylinders, pneumatic actuators, pump housings, and fluid control valves found in commercial HVAC equipment, plumbing assemblies, and industrial machinery. The NBR material provides solid resistance to petroleum-based oils, fuels, and many common hydraulic fluids, making it a practical choice across a range of trade service scenarios. Each package contains 100 rings with a minimum order of 1 package.

Key Features

• Rectangular cross-section profile designed as a backup ring to prevent O-ring extrusion under high pressure
• 90 durometer (extra hard) NBR compound for firm, reliable sealing support
• Operating temperature range of -40 to 250 degrees F suits both low-temp and moderate-heat environments
• Dash 8-115 designation ensures correct groove fitment for standard SAE sizing
• NBR material resists petroleum-based oils, fuels, and common hydraulic fluids
• Sold in a package quantity of 100 with a minimum order quantity of 1

Compatibility

Designed for use in Dash 8-115 standard O-ring groove configurations in hydraulic, pneumatic, and fluid-handling assemblies requiring a rectangular backup ring.

Installation Notes

Installation is typically performed by licensed plumbers, hydraulic technicians, or mechanical service professionals. Always depressurize and de-energize the system completely before disassembling any seal or fitting. Inspect the groove for wear, burrs, or damage before seating the ring; a damaged groove will compromise the seal. Avoid twisting or overstretching the ring during installation, and confirm groove dimensions match the Dash 8-115 specification before proceeding.