Value Collection ZMSCS70004 Silicone O-ring Dash 004 100pk

Product Description

The VALUE COLLECTION ZMSCS70004 is a Dash 004 silicone O-ring with a round cross section, designed for static and dynamic sealing applications across HVAC, plumbing, and industrial service work. It measures 0.0781 inches inside diameter, 0.2030 inches outside diameter, and 0.0625 inches thick. The silicone compound carries a Shore A hardness of 70 and is rated for continuous service from -80 degrees F to 450 degrees F, making it well suited for systems that see extreme temperature cycling or prolonged dry heat exposure. Each order ships in a pack of 100 pieces.

This O-ring is used wherever a small-diameter face seal or static groove seal is required in plumbing fittings, HVAC valve stems, refrigerant line components, and general-purpose fluid connections. The silicone material resists weathering and ozone degradation, which makes it a practical choice for outdoor or rooftop equipment. It offers limited oil resistance, so it is best specified in applications involving water, mild chemicals, or solvents rather than petroleum-heavy media. Installers should confirm the groove dimensions match the Dash 004 standard before installation.

Key Features

• Dash 004 standard sizing: 0.0781 inches ID, 0.2030 inches OD, 0.0625 inches thick
• Silicone compound rated from -80 degrees F to 450 degrees F
• Shore A hardness of 70 for a firm, reliable seal under compression
• Round cross section for consistent seating in standard O-ring grooves
• Good resistance to weathering, ozone, and dry heat
• Compatible with oils, mild chemicals, and solvents; limited petroleum oil resistance

Compatibility

Designed as a standard Dash 004 silicone O-ring suitable for use in HVAC, plumbing, and general industrial sealing applications where the groove dimensions conform to the Dash 004 specification.

Installation Notes

O-rings of this size are typically installed by licensed plumbers, HVAC technicians, or maintenance mechanics using hand tools. Always depressurize and drain the system before replacing any seal. Inspect the mating groove for burrs, corrosion, or out-of-tolerance dimensions before seating the new O-ring. Avoid twisting the O-ring during installation, as torsional stress can cause premature seal failure.