Value Collection ZMSCS70204 Silicone O-ring Dash 204 50pk

Product Description

The VALUE COLLECTION ZMSCS70204 is a Dash 204 silicone O-ring designed for static and dynamic sealing applications across HVAC, plumbing, and industrial fluid systems. It measures 0.375 inches inside diameter, 0.625 inches outside diameter, and 0.125 inches thick with a round cross section. The white silicone compound carries a Shore A hardness rating of 70 and is rated for a wide service temperature range of -80 degrees F to 450 degrees F, making it a practical choice where dry heat resistance and thermal cycling are primary concerns. Licensed tradespeople and maintenance technicians typically reach for this size when servicing fittings, valves, pumps, and manifold connections. Sold in a pack of 50.

This O-ring is suited for residential and light commercial applications where exposure to wide temperature swings, weather, and ozone is expected. It performs in dry-heat environments and offers good resistance to ozone and weathering. It carries limited oil resistance, so it is best selected for applications involving exposure to chemicals and solvents rather than heavy petroleum-based oils. Typical install scenarios include valve stem seals, pump housings, pipe unions, and equipment access ports where a Dash 204 cross-section profile is specified. Compatibility with oils, chemicals, and solvents is noted by the manufacturer.

Key Features

• Wide service temperature range: -80 degrees F to 450 degrees F for demanding thermal environments
• Round cross section conforms to standard Dash 204 groove dimensions
• Shore A hardness of 70 provides a firm, reliable seal under compression
• Good ozone and weather resistance for outdoor or exposed installations
• Compatible with chemicals and solvents; limited petroleum oil resistance
• Pack of 50 units supports stocking for service fleets or maintenance departments

Compatibility

Designed as an OEM-style replacement or maintenance-stock silicone O-ring for any application specifying a Dash 204 cross section with 0.375 inches inside diameter, 0.625 inches outside diameter, and 0.125 inches thickness. Compatible materials include oils, chemicals, and solvents as noted in manufacturer specifications.

Installation Notes

Installation is performed by licensed plumbers, HVAC technicians, or qualified maintenance technicians. Always depressurize and drain the system before removing or replacing O-rings in fluid or refrigerant circuits. Inspect the mating groove for nicks, burrs, or debris before seating the new O-ring to prevent premature failure. Do not apply petroleum-based lubricants to silicone O-rings; use a silicone-compatible assembly lubricant if needed during installation.