Value Collection ZMSCH90207 O-ring Dash 207 Nbr 90 Duro 50-pack

Product Description

The VALUE COLLECTION ZMSCH90207 is a Dash 207 Nitrile Butadiene Rubber (NBR) O-ring rated at 90 durometer, designed for static and dynamic sealing applications in HVAC, plumbing, refrigeration, and general mechanical systems. This O-ring measures 0.563 inches inside diameter and 0.813 inches outside diameter with a 0.125-inch cross-section thickness. The extra-hard 90-durometer hardness rating provides excellent compression set resistance, making it well suited for higher-pressure service points. Each package contains 50 O-rings. Installation is performed by licensed HVAC technicians, plumbers, and mechanical contractors.

This Buna-N O-ring is a widely used sealing solution for systems that handle petroleum-based fluids, hydraulic oil, fuel, and similar media. The NBR compound delivers strong resistance to abrasion and tearing, and it maintains a reliable seal across a temperature range of -40 degrees F to 250 degrees F. It is appropriate for use in valve bodies, pump housings, fittings, and fluid line connections found in residential and light commercial mechanical systems. The black round cross-section profile seats cleanly in standard Dash 207 O-ring grooves.

Key Features

• Dash 207 standard sizing: 0.563 inches ID, 0.813 inches OD, 0.125 inches thick
• 90 durometer extra-hard Buna-N compound for high compression set resistance
• Operating temperature range of -40 degrees F to 250 degrees F
• Excellent resistance to petroleum products, hydraulic fluids, and similar media
• Good tear and abrasion resistance for dynamic sealing applications
• Meets SAE and MIL-Spec standards
• Package quantity of 50 units per order

Compatibility

Designed as an OEM-style replacement O-ring for any application requiring a Dash 207 cross-section profile in Nitrile Butadiene Rubber. Compatible with systems and media involving petroleum products as noted in manufacturer specifications.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or mechanical contractors. Always depressurize and isolate the system before replacing O-rings, and confirm the groove dimensions match Dash 207 specifications before seating the ring. Do not store unused O-rings in direct sunlight or near motors and electrical equipment that may generate ozone, as this degrades the NBR compound. Lubricate the O-ring with a compatible fluid during installation to reduce the risk of tearing during assembly.