Value Collection ZMSCH90346 O-ring Nitrile Dash 346

Product Description

The VALUE COLLECTION ZMSCH90346 is a Dash 346 O-ring manufactured from Buna-N (Nitrile Butadiene Rubber), one of the most widely used elastomers in fluid sealing applications. It measures 4.125 inches inside diameter, 4.5 inches outside diameter, and 0.1875 inches (3/16 inches) thick, with a round cross section. Rated at 90 durometer (extra hard), this O-ring is suited for high-compression sealing environments. It operates across a temperature range of -40 degrees F to 250 degrees F and is sold in packages of 25 units. Buna-N material provides excellent resistance to petroleum-based fluids, strong compression set performance, and good tear and abrasion resistance.

This O-ring is used in hydraulic systems, pneumatic assemblies, pumps, valves, cylinders, and piping connections where petroleum-based fluids or lubricants are present. It is appropriate for both residential and commercial mechanical systems. Typical installers include plumbers, pipefitters, hydraulic technicians, and general maintenance mechanics. The Dash 346 designation follows standard AS568 sizing, making it a direct fit wherever that dash size is specified on OEM drawings or maintenance documentation.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction with excellent petroleum product resistance
• 90 durometer extra-hard rating for high-compression sealing applications
• Operating range of -40 degrees F to 250 degrees F
• Round cross section, 0.1875 inches thick, conforming to Dash 346 standard sizing
• Meets SAE and MIL-Spec standards
• Sold in a package quantity of 25 units

Compatibility

Compatible with petroleum products and petroleum-based lubricants. Designed as a standard Dash 346 AS568-size O-ring replacement for use in hydraulic, pneumatic, and fluid-handling assemblies that specify this dash number and Buna-N material. Not recommended for use with ozone-generating equipment, direct sunlight exposure, or incompatible chemical media.

Installation Notes

Installation should be performed by a qualified technician following applicable industry codes and equipment manufacturer guidelines. Always depressurize and de-energize the system before removing or replacing O-rings. Avoid using sharp tools that could nick or cut the O-ring sealing surface during installation. A light coating of compatible lubricant may be applied to ease installation and reduce the risk of tearing.