Value Collection ZMSCS70328 Silicone O-ring Dash 328 25pk

Product Description

The VALUE COLLECTION ZMSCS70328 is a Dash 328 silicone O-ring with a round cross section, designed for static and dynamic sealing applications across HVAC, plumbing, and industrial fluid systems. It measures 1.875 inches inside diameter, 2.25 inches outside diameter, and 0.1875 inches thick. The silicone compound is rated for a wide service temperature range of -80 degrees F to 450 degrees F, making it well-suited for high-heat and outdoor environments where rubber compounds fall short. Hardness is rated at 70 Shore A. Licensed tradespeople and MRO buyers will find this a reliable general-purpose sealing solution. Sold in a package of 25 units.

This O-ring is appropriate for use in residential and commercial HVAC systems, refrigeration equipment, plumbing assemblies, and industrial piping where exposure to wide temperature swings, ozone, or weathering is a concern. The silicone material provides good dry heat resistance and acceptable resistance to chemicals and solvents. It is not recommended for applications with heavy hydrocarbon oil exposure, where a nitrile or fluorosilicone compound would be more appropriate. It installs in standard Dash 328 grooves per AS568 sizing conventions.

Key Features

• Dash 328 standard sizing: 1.875 inches ID, 2.25 inches OD, 0.1875 inches thick
• Silicone compound rated from -80 degrees F to 450 degrees F service temperature
• 70 Shore A hardness — rated Hard for firm groove retention
• Round cross section for reliable sealing in standard O-ring grooves
• Compatible with oils, chemicals, and solvents in typical trade applications
• Good weather and ozone resistance for outdoor or exposed installations

Compatibility

Designed for use in standard AS568 Dash 328 O-ring grooves found in HVAC equipment, plumbing assemblies, and industrial fluid systems requiring wide-temperature silicone sealing.

Installation Notes

O-ring installation should be performed by a qualified HVAC technician, plumber, or maintenance professional. Relieve all system pressure and depressurize lines before removing the existing seal. Inspect the groove for burrs, corrosion, or damage before seating the new O-ring. Avoid twisting the O-ring during installation, as a twisted seal will not seat correctly and will leak.