Value Collection ZMSCS70040 Silicone O-ring Dash 040

Product Description

The VALUE COLLECTION ZMSCS70040 is a silicone O-ring with a round cross section, sized to the Dash 040 standard. It measures 2.875 inches inside diameter and 3.0 inches outside diameter, with a wall thickness of 0.0625 inches. The 70-durometer hardness rating places it in the hard range, providing solid compression resistance under load. Rated for continuous service from -80 degrees F to 450 degrees F, this O-ring is suited for sealing applications that demand wide thermal range capability and good dry heat resistance. HVAC technicians, plumbers, and industrial service professionals install this type of seal in fluid and gas handling assemblies where elevated or sub-ambient temperatures are routine.

This O-ring is commonly used in applications involving oils, chemicals, and solvents where a flexible yet durable seal is required. Its silicone compound delivers good weather and ozone resistance, making it a practical choice for outdoor or exposed mechanical assemblies. It is suitable for use in HVAC equipment, plumbing fittings, pump housings, and general fluid-system sealing tasks. The white color aids in visual inspection during installation. Note that oil resistance is limited with this compound; verify fluid compatibility before installation in heavy-oil environments.

Key Features

• Dash 040 standard sizing: 2.875 inches ID, 3.0 inches OD, 0.0625 inches thick
• Silicone compound rated from -80 degrees F to 450 degrees F operating range
• 70-durometer hardness for firm, reliable compression sealing
• Good weather and ozone resistance for outdoor or exposed service environments
• Compatible with oils, chemicals, and solvents in moderate-exposure applications
• Round cross section for consistent seating in standard O-ring grooves

Compatibility

Designed as an OEM-style replacement or service seal for fluid and gas handling assemblies requiring a Dash 040 silicone O-ring with a round cross section and 70-durometer hardness rating.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or mechanical service professionals. Always depressurize and isolate the system before removing or installing seals. Inspect the O-ring groove for burrs, scoring, or debris before seating the new ring. Avoid using petroleum-based lubricants during installation, as they may degrade silicone compounds; use a silicone-compatible assembly lubricant instead.