Value Collection ZMSCH70MD112 O-ring Dash 112 Nbr 25-pack

Product Description

The VALUE COLLECTION ZMSCH70MD112 is a Dash 112 nitrile butadiene rubber (NBR) O-ring with a 0.487-inch inside diameter, 0.687-inch outside diameter, and a 3/32-inch (0.0937-inch) thick round cross section. Hardness is rated at 70 Shore A, placing it in the hard range for elastomers. NBR is the most widely used O-ring elastomer in trade applications, valued for its excellent resistance to petroleum-based fluids, strong compression set performance, and solid tear and abrasion resistance. Each order ships as a pack of 25 rings. This part is used by HVAC technicians, plumbers, and mechanical contractors working on fluid and gas sealing applications.

The ZMSCH70MD112 is suited for static and dynamic sealing applications in systems that handle petroleum products, oils, fuels, and hydraulic fluids. Typical install scenarios include pump fittings, valve bodies, compressor ports, and threaded connections in residential and light commercial mechanical systems. The -40 degrees F minimum working temperature and 250 degrees F maximum working temperature make this ring appropriate for a broad range of service conditions encountered in HVAC, plumbing, and refrigeration work. This O-ring is not FDA approved and should not be used in food-contact or medical applications.

Key Features

• Nitrile butadiene rubber construction provides excellent resistance to petroleum products, oils, and hydraulic fluids
• Round cross section with 70 Shore A hardness for reliable sealing under compression
• Operating range of -40 degrees F to 250 degrees F suits most HVAC and plumbing service environments
• Strong tear and abrasion resistance extends service life in dynamic sealing applications
• Store away from direct sunlight, motors, and electrical equipment that may generate ozone to prevent premature degradation
• Pack of 25 rings per package supports service stock and batch repairs

Compatibility

Designed as an OEM-style replacement or service O-ring for applications requiring a Dash 112 NBR seal compatible with petroleum products and oils.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or pipefitters. Always depressurize and isolate the system before replacing any O-ring seal. Lightly lubricate the O-ring with a compatible fluid prior to installation to prevent pinching or rolling during assembly. Inspect the seating groove for damage or debris before installing the new ring.