Value Collection ZMSCH90363 O-ring Dash 363 Nbr 90 Duro

Product Description

The VALUE COLLECTION ZMSCH90363 is a Dash 363 Nitrile Butadiene Rubber (Buna-N) O-ring rated at 90 durometer hardness, classified as extra hard. It measures 6.5 inches inside diameter, 6.875 inches outside diameter, and 0.1875 inches (3/16 inches) thick with a round cross section. The black elastomer seal is designed for static and dynamic sealing applications across HVAC, plumbing, hydraulic, and industrial systems. It is installed by licensed HVAC technicians, plumbers, and maintenance professionals wherever a reliable petroleum-resistant seal is required. The temperature range of -40 to 250 degrees F suits demanding service environments.

This O-ring is suited for use in residential and commercial systems involving petroleum-based fluids, oils, fuels, and lubricants. Common applications include pump housings, valve bodies, pipe flanges, compressor fittings, and hydraulic cylinder assemblies. The Dash 363 sizing is a standard AS568 cross-reference dimension used widely across OEM and aftermarket equipment in HVAC, plumbing, and industrial fluid systems. Sold in packages of 10 units, making it practical for service vans and shop inventory.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound — the most widely used O-ring elastomer for petroleum product compatibility
• 90 durometer extra hard rating provides strong compression set resistance and abrasion resistance
• Operating temperature range: -40 to 250 degrees F for broad service applicability
• Round cross section, Dash 363 sizing — conforms to SAE and MIL-Spec standards
• Tear and abrasion resistance suitable for dynamic sealing environments
• Packaged in quantities of 10 for efficient inventory stocking

Compatibility

Compatible with petroleum products, oils, fuels, and lubricants. Conforms to SAE and MIL-Spec standards. Not recommended for exposure to ozone, direct sunlight during storage, or environments near motors and electrical equipment that generate ozone. Not FDA approved.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial maintenance technicians. Always relieve system pressure and shut off fluid supply before removing or installing O-ring seals. Clean the sealing groove thoroughly and inspect for damage before seating the new ring. Avoid rolling or twisting the O-ring during installation to prevent premature seal failure.