Value Collection ZMSCS70274 Silicone O-ring Dash 274

Product Description

The VALUE COLLECTION ZMSCS70274 is a silicone O-ring with a round cross section, sized at 10 inches inside diameter, 10.25 inches outside diameter, and 0.125 inches thick. It carries a Dash 274 designation and a Shore A hardness of 70, placing it in the hard hardness rating category. Silicone compound makes this O-ring well suited for applications that demand a wide service temperature range, from -80 degrees F to 450 degrees F, along with reliable dry heat, weather, and ozone resistance. Plumbers, HVAC technicians, and industrial maintenance trades use this type of seal where thermal cycling or outdoor exposure are primary concerns.

This O-ring is appropriate for static and low-movement sealing applications in residential and commercial mechanical systems. Its silicone material offers compatibility with oils, certain chemicals, and solvents, though users should note that oil resistance is limited and the material is not FDA approved. Typical install scenarios include pipe flanges, pump housings, valve bodies, and equipment covers where a large-diameter face seal or radial seal is required.

Key Features

• Silicone compound rated for service temperatures from -80 degrees F to 450 degrees F
• Round cross section, 0.125 inches thick, for consistent seating in standard O-ring grooves
• Dash 274 designation for straightforward cross-reference and replacement sourcing
• Shore A hardness of 70 (hard rating) for firm compression and reliable sealing
• Compatible with oils, chemicals, and solvents; limited oil resistance applies
• Good weather and ozone resistance for outdoor or exposed installations

Compatibility

Designed as a standard Dash 274 replacement O-ring for any application requiring a 10-inch ID silicone seal with a 0.125-inch cross section thickness.

Installation Notes

Installation should be performed by a qualified plumber, HVAC technician, or industrial maintenance technician. Depressurize and drain the system fully before removing the old seal and installing the replacement. Inspect the O-ring groove for nicks, corrosion, or debris that could cause leakage or damage the new seal. Lubricate the O-ring with a compatible silicone-based lubricant before seating to prevent tearing during assembly.