Value Collection ZMSCS70928 Silicone O-ring Dash 928

Product Description

The VALUE COLLECTION ZMSCS70928 is a Dash 928 silicone O-ring designed for static and dynamic sealing applications in fluid and pneumatic systems. It measures 2.9 inches inside diameter, 1.75 inches outside diameter, and 0.118 inches thick with a round cross section. Rated at 70 Shore A hardness, this O-ring handles a wide service temperature range of -80 degrees F to 450 degrees F, making it well suited for systems that see extreme cold or sustained dry heat. It is sold in a package of 10 and is specified as an O-Ring Boss gasket for straight-thread tube fittings. HVAC technicians, plumbers, and industrial maintenance professionals are the typical installers.

This silicone O-ring is appropriate for use in residential and commercial applications where wide temperature range performance, dry heat resistance, and good weather and ozone resistance are required. It is intended for straight-thread tube fitting connections where a reliable face or boss seal is needed. Note that silicone compounds offer limited oil resistance, so this ring is not the correct choice for petroleum-based fluid circuits. It fits applications calling for a Dash 928 O-ring cross section and is commonly used in HVAC piping connections, compressed air assemblies, and related trade plumbing installations.

Key Features

• Wide temperature range: rated from -80 degrees F to 450 degrees F
• Round cross section, 0.118 inches thick, for reliable boss and face sealing
• 70 Shore A hardness rating provides firm compression set resistance
• Good weather and ozone resistance extends service life in exposed installations
• Specified as an O-Ring Boss gasket for straight-thread tube fittings
• Sold in a convenient pack of 10 to support service calls and stocking

Compatibility

Designed as an OEM-style replacement or service O-ring for straight-thread tube fitting connections requiring a Dash 928 silicone seal with a 2.9 inch inside diameter and 1.75 inch outside diameter.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber familiar with the fitting system being serviced. Always depressurize and isolate the system before removing or replacing O-rings, and ensure the seating surface is clean and free of debris before installing the new ring. Silicone O-rings should be lubricated with a compatible silicone-based lubricant prior to installation to prevent tearing during assembly. Do not use petroleum-based greases or oils, as silicone compounds have limited oil resistance.