Value Collection ZMSCS70248 Silicone O-ring Dash 248 5-pack

Product Description

The VALUE COLLECTION ZMSCS70248 is a round-cross-section silicone O-ring sold in a pack of five, designed for static and dynamic sealing applications across HVAC, plumbing, and industrial fluid systems. It carries a Dash 248 designation with a 4.75-inch inside diameter, 5-inch outside diameter, and 0.125-inch thickness. The 70-durometer silicone compound delivers a working temperature range of -80 degrees F to 450 degrees F, making it well suited for high-heat and wide-temperature-swing service environments. Licensed trades and maintenance techs use these rings where heat resistance and weather exposure are primary concerns.

This O-ring is appropriate for residential and light commercial applications involving oils, chemicals, and solvents at moderate concentrations. Its wide temperature tolerance makes it a common choice in HVAC equipment sealing points, pump housings, and piping connections that experience thermal cycling. Typical install scenarios include sealing flange faces, valve bodies, and access port fittings in systems that cycle between low ambient temperatures and sustained elevated operating temperatures. The pack quantity of five supports service kit builds and multi-unit repair runs.

Key Features

• Silicone compound rated from -80 degrees F to 450 degrees F for wide-temperature applications
• Dash 248 standard sizing: 4.75 inches ID, 5 inches OD, 0.125 inches thick
• 70-durometer hardness rating for firm, reliable sealing under compression
• Round cross section for consistent gland fit and uniform squeeze
• Compatible with oils, chemicals, and solvents; good weather and ozone resistance
• Pack of 5 units per order — suitable for stocking service kits

Compatibility

Designed as a standard Dash 248 replacement O-ring for any gland or fitting that accepts a 4.75-inch ID by 5-inch OD by 0.125-inch cross-section silicone seal. Suitable for use in systems requiring good dry heat resistance and weather or ozone stability; limited oil resistance should be considered when selecting for continuous hydrocarbon immersion service.

Installation Notes

Installation is performed by plumbers, HVAC technicians, or industrial mechanics working on sealed fluid or gas systems. Always isolate, depressurize, and drain the relevant system section before removing the old O-ring. Inspect the gland groove for nicks or corrosion that could cause the new ring to seat unevenly. Avoid using petroleum-based lubricants on silicone O-rings unless confirmed compatible with the seal material and system media.