Value Collection ZMSCS70021 Silicone O-ring Dash 021 50-pack

Product Description

The VALUE COLLECTION ZMSCS70021 is a round cross-section silicone O-ring sized at 0.926 inches inside diameter, 1.063 inches outside diameter, and 0.0625 inches thick, conforming to Dash 021 standards. Made from silicone with a Shore A hardness of 70, this seal is engineered for applications that demand a wide service temperature range, from -80 degrees F to 450 degrees F. It offers good resistance to dry heat, weathering, and ozone. Licensed tradespeople, maintenance mechanics, and industrial service technicians use this O-ring where a reliable, heat-stable elastomeric seal is required. Each package contains 50 pieces.

This O-ring is suited for use in HVAC systems, plumbing assemblies, fluid handling equipment, and general industrial sealing applications where exposure to elevated temperatures, outdoor conditions, or ozone is a concern. Its silicone construction makes it appropriate for contact with certain oils, chemicals, and solvents, though oil resistance is limited and should be verified against the specific fluid in service. The Dash 021 designation identifies the cross-section and diameter for straightforward cross-referencing against standard O-ring charts.

Key Features

• Silicone material rated from -80 degrees F to 450 degrees F for wide thermal range service
• Dash 021 standard sizing: 0.926 inches ID, 1.063 inches OD, 0.0625 inches thick
• Round cross-section profile for consistent groove seating and reliable compression
• Shore A hardness of 70 classified as Hard for positive sealing under typical service loads
• Good weather and ozone resistance for outdoor or exposed-environment installations
• Sold in a 50-piece package to support service stock and batch repair work

Compatibility

Designed as a standard Dash 021 O-ring replacement for any application requiring a 15/16 inches ID by 1-1/16 inches OD by 1/16 inches thick round cross-section silicone seal. Verify groove dimensions and fluid compatibility before installation.

Installation Notes

Shut down and depressurize the system before removing the old O-ring. Clean the groove and mating surfaces thoroughly to remove debris, old sealant, or residue that could compromise the seal. Lubricate the O-ring with a compatible silicone-safe lubricant before seating to prevent tearing during assembly. Do not stretch the ring beyond the minimum required to seat it, and confirm the groove dimensions match Dash 021 specifications before installation.