Value Collection ZMSCS70310 Silicone O-ring Dash 310 25pk

Product Description

The VALUE COLLECTION ZMSCS70310 is a silicone O-ring with a round cross section, sold in a pack of 25. It measures 0.500 inches inside diameter, 0.875 inches outside diameter, and 0.1875 inches thick. The Dash 310 designation confirms its dimensional classification within the standard AS568 sizing series. Hardness is rated at 70 Shore A, placing it in the hard range. This O-ring is white silicone, suited for static and dynamic sealing applications across HVAC, plumbing, and fluid-handling systems where a wide service temperature range is required. Licensed tradespeople and industrial maintenance technicians are the primary installers.

This O-ring is designed for applications demanding broad temperature tolerance, running from -80 degrees F to 450 degrees F. It performs well in environments with dry heat, outdoor weathering, and ozone exposure. It is compatible with oils, chemicals, and solvents, though oil resistance is limited compared to nitrile alternatives. Typical applications include sealing fittings, valves, pumps, and manifold connections in HVAC refrigerant lines, potable water systems, and chemical-handling equipment where silicone outperforms standard rubber compounds.

Key Features

• Dash 310 standard sizing: 0.500 inches ID, 0.875 inches OD, 0.1875 inches thick
• Temperature range: -80 degrees F to 450 degrees F for wide thermal tolerance
• 70 Shore A hardness for firm compression and reliable sealing
• Good weather and ozone resistance for outdoor or exposed installations
• Compatible with oils, chemicals, and solvents (note: limited oil resistance)
• Round cross section for standard groove seating

Compatibility

Designed as a standard Dash 310 silicone O-ring replacement for any fitting, valve, or housing machined to accept a 0.500 inches ID by 0.875 inches OD round cross-section seal.

Installation Notes

Installation is performed by HVAC technicians, plumbers, or mechanical maintenance professionals. Always depressurize and isolate the system before removing or replacing any sealing component. Inspect the groove and mating surfaces for wear or contamination before seating the new O-ring. Lubricate with a compatible lubricant as required by the application and verify the O-ring is fully seated without twisting before reassembly.