Value Collection ZMSCS70050 Silicone O-ring Dash 050

Product Description

The VALUE COLLECTION ZMSCS70050 is a silicone O-ring with a round cross section, designed for static and dynamic sealing applications across a broad range of operating conditions. It measures 5.25 inches inside diameter, 5.375 inches outside diameter, and 0.0625 inches thick, conforming to the Dash 050 designation. With a durometer hardness of 70 Shore A, this ring holds its shape under compression while maintaining a reliable seal. Silicone compound provides strong resistance to dry heat and weathering, making it a practical choice wherever standard elastomers fall short. Licensed plumbers, HVAC technicians, and mechanical service professionals commonly specify this size for large-bore fittings, flanges, and equipment access panels.

This O-ring is suited for residential and commercial applications that demand a wide service temperature range. Its silicone material performs from -80 degrees F up to 450 degrees F, making it appropriate for high-heat HVAC equipment, pool heater plumbing, and general mechanical assemblies exposed to outdoor weather and ozone. It is sold in a package quantity of 10, making it convenient for service fleets and shop stock. Note that silicone offers limited oil resistance; verify fluid compatibility before installation in oil-wetted systems.

Key Features

• Wide temperature range: -80 degrees F to 450 degrees F continuous service
• 70 Shore A hardness for firm, reliable compression sealing
• Round cross section, Dash 050 standard sizing
• Good weather and ozone resistance for outdoor and exposed installations
• White silicone compound with good dry heat resistance
• Sold in packs of 10 for efficient shop and fleet stocking

Compatibility

Designed as a standard Dash 050 silicone O-ring replacement for large-bore fittings, flanges, and equipment housings that require a 5.25-inch inside diameter seal in plumbing, HVAC, pool, and general mechanical service applications.

Installation Notes

Power down or shut off the system and relieve all pressure before replacing any O-ring. Clean the sealing groove thoroughly and inspect for nicks or corrosion that could compromise the seal. Silicone O-rings are generally installed dry or with a silicone-compatible lubricant; avoid petroleum-based greases, which can degrade silicone compounds. Verify that the replacement ring is compatible with the process fluid before returning the system to service.