Value Collection ZMSCS70158 Silicone O-ring Dash 158

Product Description

The VALUE COLLECTION ZMSCS70158 is a silicone O-ring with a round cross section, sized to Dash 158 standards and sold in a pack of 10. It measures 4.75 inches inside diameter, 4.938 inches outside diameter, and 0.0937 inches thick. Rated Shore 70 hardness, this O-ring is engineered for applications demanding wide temperature tolerance, spanning -80 degrees F to 450 degrees F. Licensed plumbers, HVAC technicians, and industrial maintenance professionals use this type of seal where dry heat resistance and ozone stability are required. The white silicone construction offers good resistance to weathering and ozone exposure, though oil resistance is limited.

This O-ring is suited for residential and commercial mechanical systems where high-temperature sealing is a priority. Typical applications include fluid handling assemblies, equipment covers, and enclosure seals that encounter chemicals, solvents, or wide ambient temperature swings. The Dash 158 sizing makes it straightforward to cross-reference against standard O-ring size charts during service or new installation work. Each package contains 10 O-rings, supporting both single repairs and batch servicing jobs.

Key Features

• Dash 158 standard sizing: 4.75 inches ID x 4.938 inches OD x 0.0937 inches thick
• Silicone material rated from -80 degrees F to 450 degrees F operating range
• Shore 70 hardness for firm, reliable compression sealing
• Round cross section for compatibility with standard O-ring groove profiles
• Good weather and ozone resistance for outdoor or exposed installations
• Pack of 10 units per package for efficient stocking and serviceability

Compatibility

Designed as a standard Dash 158 silicone O-ring replacement suited for fluid handling, equipment enclosures, and mechanical assemblies that call for wide temperature range and dry heat resistance. Compatible with oils, chemicals, and solvents; note that oil resistance is limited compared to nitrile alternatives.

Installation Notes

Installation of O-rings is performed by qualified plumbers, HVAC technicians, or maintenance mechanics depending on the application. Always shut off fluid supply, relieve system pressure, and de-energize any associated equipment before replacing seals. Inspect the mating groove for burrs, corrosion, or debris before seating the new O-ring. Avoid using petroleum-based lubricants with silicone O-rings; use a silicone-compatible lubricant if needed during installation.