Value Collection ZMSCH70283 O-ring Dash 283 Nitrile Nbr

Product Description

The VALUE COLLECTION ZMSCH70283 is a Dash 283 O-ring made from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in industrial and mechanical sealing applications. It measures 17 inches inside diameter, 17.25 inches outside diameter, and 0.125 inches thick, with a round cross section and a Shore hardness rating of 70. This O-ring is suited for static and dynamic sealing in systems that handle petroleum-based fluids. It ships in a package quantity of two and is installed by plumbers, pipefitters, HVAC technicians, and industrial maintenance trades wherever a standard Dash 283 seal is required.

This O-ring is commonly used in large-diameter pipe flanges, pump housings, valve bonnets, and fluid system assemblies that contact petroleum products, oils, and hydraulic fluids. Its Buna-N compound provides excellent resistance to petroleum-based media, making it a practical choice in plumbing, HVAC, and light industrial equipment where sealing integrity against oils and fuels is a service priority. It is not recommended for use with ozone-generating equipment or in direct sunlight storage conditions.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound with excellent resistance to petroleum products, oils, and hydraulic fluids
• Shore hardness of 70 with a hard hardness rating for reliable compression set performance
• Operating temperature range of -40 degrees F to 250 degrees F
• Round cross section profile for consistent seating in standard O-ring grooves
• Meets SAE and MIL-Spec standards
• Black color; package quantity of 2 per order

Compatibility

Designed as a standard Dash 283 O-ring replacement compatible with petroleum products and systems requiring Buna-N elastomer seals in large-diameter applications.

Installation Notes

Installation is performed by licensed plumbers, pipefitters, or HVAC technicians as part of routine maintenance or component replacement. Depressurize and drain the system fully before removing any existing seals. Clean the O-ring groove and mating surfaces to remove debris or old seal material before seating the new O-ring. Do not store Buna-N O-rings near motors, electrical equipment, or in direct sunlight, as ozone and UV exposure degrade the elastomer.