Value Collection ZMSCS70256 Silicone O-ring Dash 256 5-pack

Product Description

The VALUE COLLECTION ZMSCS70256 is a Dash 256 silicone O-ring with a round cross section, designed for static and dynamic sealing applications across a wide range of operating temperatures. It measures 5.75 inches inside diameter, 6.0 inches outside diameter, and 0.125 inches thick. The silicone compound carries a Shore A hardness rating of 70 and is rated for service from -80 degrees F to 450 degrees F, making it well suited where dry heat resistance, weather resistance, and ozone resistance are required. Each package contains 5 O-rings. Installation is performed by plumbers, HVAC technicians, and general mechanical trades.

This O-ring is used in sealing applications that demand a wide service temperature range and good resistance to weathering and ozone exposure. Typical installations include HVAC equipment flanges, plumbing fittings, pumps, and general industrial equipment housings. The silicone material offers limited oil resistance and is compatible with oils, chemicals, and solvents in applications where those limitations are understood. It is not FDA approved, so it is not intended for food-contact or potable-water service lines where FDA compliance is required.

Key Features

• Silicone compound rated from -80 degrees F to 450 degrees F for wide-temperature service
• Round cross section, 0.125 inches thick, for consistent groove seating
• Shore A hardness of 70 for reliable compression set resistance
• Good weather and ozone resistance for outdoor or exposed equipment
• Compatible with oils, chemicals, and solvents within rated limits
• Packaged in quantities of 5 for stock or multi-unit service calls

Compatibility

Designed as a standard Dash 256 replacement O-ring for any groove sized to accept a 5.75-inch ID, 6.0-inch OD, 0.125-inch cross-section ring in silicone material. Not FDA approved and not suitable for potable water or food-contact applications requiring compliant elastomers.

Installation Notes

De-energize and depressurize the system before removing the old O-ring. Clean the groove of debris, old lubricant, and any remnants of the previous seal before seating the new ring. Apply a compatible lubricant to the O-ring and groove surfaces to ease installation and prevent cutting or rolling during assembly. Confirm groove dimensions match Dash 256 specifications before installation to avoid improper compression.