Value Collection ZMSCS70358 Silicone O-ring Dash 358 5pk

Product Description

The VALUE COLLECTION ZMSCS70358 is a Dash 358 silicone o-ring sold in a pack of 5, designed for static and dynamic sealing applications that demand wide temperature range performance. The ring measures 5.625 inches inside diameter and 6 inches outside diameter with a 3/16-inch (0.1875 inch) round cross section. Hardness is rated at 70 Shore A, placing it in the hard range. Silicone compound gives this o-ring good dry heat resistance, weather resistance, and ozone resistance, making it a reliable choice for plumbing, HVAC, and general industrial maintenance applications.

This o-ring is suited for sealing flanges, pipe connections, valve bodies, and mechanical assemblies where exposure to elevated temperatures or outdoor conditions is a concern. The Dash 358 designation is a standard AS568 size, so it fits any gland machined to that standard. The silicone compound holds up against oils, chemicals, and solvents within its rated range, though oil resistance is limited compared to nitrile alternatives. A licensed plumber, HVAC technician, or mechanical trades professional would typically specify this size for large-bore sealing tasks in residential or light commercial systems.

Key Features

• Wide service temperature range: -80 degrees F to 450 degrees F
• 70 Shore A hardness for firm, reliable sealing under compression
• Round cross section conforms to standard Dash 358 gland dimensions
• Good resistance to weather and ozone degradation
• Compatible with oils, chemicals, and solvents within rated limits
• Pack of 5 units per package, minimum order quantity of 1

Compatibility

Designed as a standard AS568 Dash 358 replacement o-ring for any gland or groove machined to Dash 358 specifications across plumbing, HVAC, and general industrial equipment.

Installation Notes

Shut down and depressurize the system fully before removing the old o-ring or installing the replacement. Clean the gland groove of debris, old sealant, and residual compound before seating the new ring. Avoid twisting the o-ring during installation, as a twisted ring will not seal evenly and may fail prematurely. Consult applicable codes such as the IPC or IFGC for sealing requirements specific to the system being serviced.