Value Collection ZMSCS70121 Silicone O-ring Dash 121

Product Description

The VALUE COLLECTION ZMSCS70121 is a silicone O-ring with a round cross section, sized to Dash 121 standards. It measures 1.0625 inches inside diameter, 1.25 inches outside diameter, and 0.0937 inches thick. Rated at 70 Shore A hardness, this O-ring handles a service temperature range of -80 degrees F to 450 degrees F, making it a practical choice for applications that demand wide thermal tolerance and good dry heat resistance. Plumbers, HVAC technicians, and industrial maintenance professionals install these O-rings as static or low-motion seals in fluid and pneumatic systems.

This silicone O-ring is suited for residential and light commercial applications where exposure to moderate oils, chemicals, and solvents is expected. Its formulation provides good weather and ozone resistance, which makes it appropriate for outdoor or climate-exposed equipment. The Dash 121 sizing is a standard designation widely referenced in sealing and fluid-handling assemblies. This item ships in a package quantity of 50, which supports stocking needs for service fleets and maintenance operations.

Key Features

• Dash 121 standard sizing: 1.0625 inches ID, 1.25 inches OD, 0.0937 inches thick
• Silicone material with round cross section for consistent sealing contact
• Service temperature range: -80 degrees F to 450 degrees F
• 70 Shore A hardness rating for firm, reliable seating
• Compatible with oils, chemicals, and solvents in typical service conditions
• Good weather and ozone resistance for outdoor or exposed installations

Compatibility

Designed as a standard Dash 121 replacement or new-install silicone O-ring for fluid, pneumatic, and HVAC sealing applications requiring a wide temperature range and good dry heat resistance.

Installation Notes

Silicone O-rings are installed by licensed plumbers, HVAC technicians, and qualified maintenance personnel. Always depressurize and shut off fluid supply to the system before removing or installing any sealing component. Inspect the groove and mating surfaces for nicks or debris before seating the O-ring. Do not stretch or twist the O-ring during installation, as deformation can compromise the seal.