Value Collection ZMSCS70264 Silicone O-ring Dash 264 5-pack

Product Description

The VALUE COLLECTION ZMSCS70264 is a round-cross-section silicone O-ring sized to Dash 264 dimensions: 7.5 inches inside diameter, 7.75 inches outside diameter, and 0.125 inches thick. Rated at 70 Shore A hardness, this O-ring handles a wide service temperature range from -80 degrees F to 450 degrees F, making it suitable for applications requiring reliable sealing under dry heat or extreme cold. It ships in a pack of five. HVAC technicians, plumbers, and industrial maintenance professionals use this O-ring where a large-bore, high-temperature silicone seal is required.

This O-ring is appropriate for residential and light commercial HVAC equipment, large-diameter plumbing flanges, pump housings, and process equipment where exposure to heat, ozone, and weathering is common. Silicone compound provides good resistance to ozone and weather aging. Note that silicone offers only limited resistance to oils and petroleum-based fluids, so verify fluid compatibility before installation. This part is sold in a pack of five units.

Key Features

• Dash 264 standard sizing: 7.5 inches ID, 7.75 inches OD, 0.125 inches thick
• Wide service temperature range: -80 degrees F to 450 degrees F
• 70 Shore A hardness rated Hard for positive seating under compression
• Round cross section for consistent groove fit and uniform sealing load
• Good resistance to ozone, weathering, and dry heat
• Compatible with oils, chemicals, and solvents within rated limits; limited petroleum oil resistance

Compatibility

Designed as a standard Dash 264 silicone O-ring replacement for any groove or port machined to Dash 264 dimensions. Suitable for use with oils, chemicals, and solvents within silicone compatibility limits. Not recommended for dynamic high-oil-exposure applications.

Installation Notes

Power down or depressurize the system fully before removing the old O-ring. Inspect the groove for nicks, burrs, or corrosion that could damage the new seal. Lubricate the O-ring with a silicone-compatible lubricant before installation to prevent tearing during assembly. Avoid petroleum-based greases, as they may degrade the silicone compound over time.