Value Collection ZMSCS70246 Silicone O-ring Dash 246 5-pack

Product Description

The VALUE COLLECTION ZMSCS70246 is a round cross-section silicone O-ring sized to Dash 246 dimensions, with a 4.5-inch inside diameter, 4.75-inch outside diameter, and 0.125-inch thickness. Rated at 70 Shore A hardness, this O-ring is engineered for static and dynamic sealing applications that demand a wide service temperature range, from -80 degrees F to 450 degrees F. Silicone construction provides good dry heat, weather, and ozone resistance. Licensed tradespeople including plumbers, HVAC technicians, and mechanical contractors install these seals during equipment assembly, maintenance, and repair work. Each package contains 5 O-rings.

This O-ring is suited for residential and commercial sealing applications where exposure to wide temperature swings, outdoor weathering, or ozone is a concern. Typical installations include pump housings, valve bodies, flanged connections, and HVAC equipment where a large-diameter face or radial seal is required. It is compatible with oils, chemicals, and solvents within its rated temperature range, though oil resistance is limited and should be evaluated against service conditions before installation.

Key Features

• Dash 246 silicone O-ring with 4.5-inch ID and 4.75-inch OD
• 0.125-inch thickness with round cross-section profile
• Wide service temperature range: -80 degrees F to 450 degrees F
• 70 Shore A hardness rated Hard for firm, reliable sealing under compression
• Good weather and ozone resistance for outdoor or exposed installations
• Compatible with oils, chemicals, and solvents — limited oil resistance; verify suitability for oil-heavy service

Compatibility

Designed as a standard Dash 246 O-ring replacement for large-diameter static or dynamic seal applications in HVAC, plumbing, and mechanical equipment where silicone elastomer is specified.

Installation Notes

Installation should be performed by a qualified technician familiar with sealing system requirements. Depressurize and isolate the system before removing or installing any O-ring. Inspect the mating groove and sealing surfaces for damage or contamination before fitting the new O-ring. Do not overstretch the O-ring during installation, and confirm the groove dimensions are correct for Dash 246 sizing before use.