Value Collection ZMSCS70249 Silicone O-ring Dash 249 5-pack

Product Description

The VALUE COLLECTION ZMSCS70249 is a Dash 249 silicone O-ring supplied in a pack of 5. It measures 4.875 inches inside diameter, 5.125 inches outside diameter, and 0.125 inches thick with a round cross section. The silicone compound is rated for a working temperature range of -80 degrees F to 450 degrees F, making it well suited for applications that demand wide thermal tolerance and good dry heat resistance. Hardness is rated at 70 Shore A. This O-ring is used by plumbers, HVAC technicians, and industrial maintenance trades wherever a reliable face or radial seal is required.

This O-ring fits applications where silicone elastomer is the specified compound, including fluid handling assemblies, pump housings, valve bodies, and HVAC equipment that operate across wide temperature swings. Silicone provides good weather and ozone resistance, making it appropriate for both indoor and outdoor service environments. It offers limited oil resistance, so it is best suited for water, air, and dry-heat service rather than petroleum-heavy applications. Each package contains 5 O-rings.

Key Features

• Silicone compound rated from -80 degrees F to 450 degrees F for wide thermal range service
• Round cross section, 0.125 inches thick, for standard groove fitment
• 70 Shore A hardness — rated Hard — for positive sealing under compression
• Good weather and ozone resistance extends service life in exposed installations
• Compatible with oils, chemicals, and solvents per manufacturer specifications; limited oil resistance noted
• Packaged in quantities of 5 to support single-job or stock replenishment needs

Compatibility

Designed as a standard Dash 249 O-ring replacement for any application specifying a 4.875 inches ID silicone O-ring with a 0.125-inch cross section.

Installation Notes

O-ring installation is typically performed by licensed plumbers, HVAC technicians, or qualified maintenance personnel. Before replacing any O-ring, relieve all system pressure and shut off fluid supply to the assembly being serviced. Lubricate the O-ring with a compatible lubricant before installation to prevent tearing during seating. Do not roll or twist the O-ring into the groove; seat it evenly to ensure a uniform seal.