Value Collection ZMSCH70MD212 O-ring Dash 212 Nbr 10-pack

Product Description

The VALUE COLLECTION ZMSCH70MD212 is a Dash 212 nitrile butadiene rubber (NBR) O-ring with a 7/8 inch inner diameter, 1-1/8 inch outer diameter, and 1/8 inch cross-section thickness. It features a round cross-section profile and a Shore A hardness of 70, placing it in the hard hardness range. NBR is the most widely used O-ring elastomer in trade applications, offering excellent resistance to petroleum-based fluids, strong compression set resistance, and good tear and abrasion resistance. This package contains 10 O-rings. Licensed plumbers, HVAC technicians, and mechanical contractors install this type of seal in fluid-handling assemblies across residential and commercial systems.

This O-ring is suited for use in hydraulic, pneumatic, and plumbing assemblies where petroleum product exposure is a factor. It performs across a service temperature range of -40 degrees F to 250 degrees F, making it appropriate for a wide range of heating, cooling, and fluid transfer applications. The Dash 212 designation is a standard AN/AS568 size, commonly found in fittings, valve bodies, pump housings, and pipe unions. NBR compound is not recommended for exposure to ozone-generating sources such as electric motors or direct sunlight during storage.

Key Features

• Dash 212 standard size: 7/8 inch ID, 1-1/8 inch OD, 1/8 inch thick
• Nitrile butadiene rubber construction with excellent petroleum fluid resistance
• Shore A 70 hardness for reliable compression set in standard mechanical joints
• Rated for service temperatures from -40 degrees F to 250 degrees F
• Round cross-section profile for consistent sealing in standard O-ring grooves
• Sold in a pack of 10 for job-site and shop inventory use

Compatibility

Designed as a standard AN/AS568 Dash 212 O-ring replacement compatible with petroleum-based fluid systems. Compatible materials include petroleum products as specified by the manufacturer.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified mechanical contractors. Always depressurize and de-energize the system before replacing O-rings in any fluid or refrigerant circuit. Clean the groove and mating surfaces before seating the O-ring, and avoid twisting or pinching the ring during installation. Do not store NBR O-rings near electric motors, ozone-generating equipment, or in direct sunlight, as ozone exposure degrades the elastomer.