Value Collection ZMSCH90206 O-ring Dash 206 Nbr 90 Duro

Product Description

The VALUE COLLECTION ZMSCH90206 is a Dash 206 Buna-N (Nitrile Butadiene Rubber) O-ring with a 0.5-inch inside diameter, 0.75-inch outside diameter, and a cross-section thickness of 0.125 inches. Rated at 90 durometer (extra hard), it delivers strong resistance to compression set, tearing, and abrasion. Its operating temperature range spans -40 to 250 degrees F, making it suitable for a broad range of service conditions. Sold in a package quantity of 50, this O-ring is installed by HVAC technicians, plumbers, and pipefitters in systems where petroleum-based fluids are present.

This O-ring is suited for sealing applications in residential and commercial HVAC, plumbing, and hydraulic systems where petroleum product compatibility is required. Buna-N is the most widely used O-ring elastomer in trade applications and performs reliably in compressor fittings, valve bodies, pump assemblies, and fluid line connections. The 90 durometer hardness rating makes it a strong choice where higher extrusion resistance is needed under pressure. Conforms to SAE and MIL-Spec standards.

Key Features

• Buna-N (NBR) elastomer with excellent resistance to petroleum-based fluids and lubricants
• 90 durometer extra-hard rating provides strong extrusion resistance under pressure
• Wide temperature range: -40 to 250 degrees F
• Round cross-section, Dash 206 standard sizing
• Meets SAE and MIL-Spec standards
• Pack of 50 for shop stock or service van inventory

Compatibility

Compatible with petroleum-based products and fluids. Designed for use in sealing applications requiring a Dash 206 Buna-N O-ring. Not FDA approved; not recommended for food-contact or ozone-heavy environments. Store away from direct sunlight, motors, and electrical equipment that may generate ozone.

Installation Notes

Installation is performed by licensed HVAC technicians, plumbers, or pipefitters depending on the application. Always depressurize and de-energize the system before removing or installing O-rings. Lightly lubricate with a compatible petroleum-based grease before seating to prevent pinching or tearing during assembly. Do not install in applications involving ozone, strong acids, ketones, or chlorinated solvents, as Buna-N is not resistant to those media.