Value Collection ZMSCS70356 Silicone O-ring Dash 356 5pk

Product Description

The VALUE COLLECTION ZMSCS70356 is a round cross-section silicone O-ring sized to Dash 356 standards, with a 5.375-inch inside diameter, 5.75-inch outside diameter, and a 0.1875-inch (3/16 inches) cross-section thickness. Rated at 70 Shore A hardness, this O-ring is built for applications that demand a wide operating temperature range, running from -80 degrees F to 450 degrees F. Silicone construction provides solid resistance to dry heat, weathering, and ozone. Licensed trades and maintenance technicians install these in sealing applications where thermal cycling or outdoor exposure is a primary concern. Each package contains 5 O-rings.

This O-ring is suited for use in HVAC, plumbing, and industrial equipment where large-bore sealing is required. The silicone compound performs well in dry-heat environments, outdoor-exposed assemblies, and systems subject to temperature extremes. It carries limited oil resistance, making it a better fit for air, gas, or mild chemical service than for continuous petroleum-fluid contact. Typical install scenarios include large valve bodies, pump housings, access covers, and flanged connections that call for a Dash 356 profile.

Key Features

• Silicone material rated for -80 degrees F to 450 degrees F operating temperature range
• Round cross-section, Dash 356 sizing: 5.375 inches ID, 5.75 inches OD, 0.1875 inches thick
• 70 Shore A hardness for firm, reliable compression sealing
• Good resistance to weathering, ozone, and dry heat
• Compatible with oils, certain chemicals, and solvents with noted limitations on petroleum-fluid exposure
• Sold in a pack of 5, minimum order quantity of 1 pack

Compatibility

Designed as an OEM-style or aftermarket replacement O-ring for any application calling for a Dash 356 round cross-section silicone seal with a 5.375-inch inside diameter and 0.1875-inch cross-section thickness.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or maintenance mechanics. Always depressurize and isolate the system before removing the old O-ring and seating the replacement. Inspect the groove and mating surfaces for nicks or corrosion that could compromise the seal. Avoid using petroleum-based lubricants with silicone O-rings; use a silicone-compatible assembly lubricant if needed to seat the ring without rolling or twisting it.