Value Collection ZMSCH90137 O-ring Dash 137 Nbr 90 Duro 50 Pack

Product Description

The VALUE COLLECTION ZMSCH90137 is a Dash 137 Nitrile Butadiene Rubber (Buna-N) O-ring designed for static and dynamic sealing applications across HVAC, plumbing, hydraulic, and fluid-handling systems. The ring measures 2.63 inches inside diameter, 2.25 inches outside diameter, and 0.103 inches thick with a round cross section. Hardness is rated at 90 durometer, placing it in the extra-hard category for applications that demand excellent compression set resistance and minimal deformation under load. Operating temperature range spans -40 degrees F to 250 degrees F. Licensed HVAC technicians, plumbers, and hydraulic technicians routinely stock this size for field repairs and preventive maintenance work.

This O-ring is well suited for sealing against petroleum-based fluids including oils, fuels, and hydraulic fluids. The Buna-N compound provides strong resistance to petroleum products along with good tear and abrasion resistance, making it a common choice in compressor, pump, valve, and fitting assemblies. It is sold in a package quantity of 50, making it practical for shop stock or recurring service routes. The 90 durometer hardness is appropriate for higher-pressure sealing environments where softer compounds would extrude.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound with excellent resistance to petroleum products
• 90 durometer extra-hard rating for high-compression, high-pressure sealing
• Operating range of -40 degrees F to 250 degrees F for broad thermal compatibility
• Round cross section at 0.103 inches thick, conforming to Dash 137 sizing standards
• Meets SAE and MIL-Spec standards
• Package quantity of 50 for shop stocking and route service

Compatibility

Designed as a standard Dash 137 O-ring replacement compatible with petroleum product fluid systems. Compatible materials include petroleum-based oils, fuels, and hydraulic fluids. Not recommended for exposure to ozone, direct sunlight, or environments with ozone-generating electrical equipment during storage or service.

Installation Notes

Installation of O-rings in pressurized fluid systems should be performed by qualified HVAC technicians or plumbers following applicable system-specific procedures. Always depressurize and de-energize the system before disassembling fittings or valve bodies. Lubricate the O-ring lightly with a compatible fluid before seating to prevent tearing during installation. Inspect the groove and mating surfaces for nicks or burrs that could compromise the seal.