Value Collection ZMSCS70245 Silicone O-ring Dash 245 5-pack

Product Description

The VALUE COLLECTION ZMSCS70245 is a round cross-section silicone O-ring sold in a pack of 5, designed for static and dynamic sealing applications across HVAC, plumbing, and industrial service work. It measures 4.375 inches inside diameter, 4.625 inches outside diameter, and 0.125 inches thick, conforming to Dash 245 sizing. Rated at Shore 70 hardness, this silicone compound is formulated for a wide service temperature range of -80 degrees F to 450 degrees F, making it well suited for high-heat and outdoor environments where weather and ozone resistance are priorities.

This O-ring is appropriate for use in residential and commercial HVAC systems, plumbing connections, and light industrial assemblies where exposure to dry heat, ozone, or weathering is a concern. Silicone compounds in this hardness range are commonly used for flange seals, access panel gaskets, and equipment covers. The white color aids in visual identification during inspection. Note that this compound has limited resistance to oils and fuels, so it is not recommended for petroleum-based fluid sealing without verifying chemical compatibility first.

Key Features

• Dash 245 standard sizing: 4.375 inches ID, 4.625 inches OD, 0.125 inches thick
• Silicone compound rated for -80 degrees F to 450 degrees F service temperature range
• Shore 70 hardness for firm, reliable sealing under compression
• Good resistance to weather, ozone, and dry heat
• Compatible with oils, chemicals, and solvents within manufacturer-stated limits
• Pack of 5 units per order

Compatibility

Designed as a Dash 245 standard O-ring replacement suitable for any application requiring a 4.375-inch ID silicone seal at 0.125-inch cross-section thickness. Verify chemical compatibility with the process fluid before installation.

Installation Notes

O-ring installation should be performed by a qualified technician following applicable system codes and equipment service manuals. De-energize and depressurize the system completely before replacing any seal. Inspect the groove and mating surfaces for damage or debris prior to seating the O-ring. Avoid twisting or stretching the ring during installation, and do not use petroleum-based lubricants with silicone compounds unless confirmed compatible.