Value Collection ZMSCS70255 Silicone O-ring Dash 255 5-pack

Product Description

The VALUE COLLECTION ZMSCS70255 is a silicone O-ring with a round cross section, supplied in a pack of 5. It measures 5.625 inches inside diameter, 5.875 inches outside diameter, and 0.125 inches thick, conforming to Dash 255 sizing. Rated Shore 70 hardness, this O-ring handles a continuous service range from -80 degrees F to 450 degrees F, making it suitable for applications that demand wide temperature tolerance and reliable sealing in dry heat environments. HVAC technicians, plumbers, and industrial maintenance trades install this part as a static or low-motion seal in flanges, fittings, and equipment housings.

This O-ring is suited for residential and commercial applications where exposure to moderate oils, chemicals, and solvents is expected. Silicone compound provides good weather and ozone resistance, making it appropriate for outdoor equipment enclosures, HVAC system access panels, pump housings, and similar sealing points. The Dash 255 designation follows AS568 standard sizing, allowing straightforward cross-referencing during service calls. Each package contains 5 O-rings for on-hand inventory or replacement stock.

Key Features

• Dash 255 AS568 standard sizing: 5.625 inches ID, 5.875 inches OD, 0.125 inches thick
• Wide service temperature range: -80 degrees F to 450 degrees F
• Shore 70 hardness rating for firm sealing in static and low-motion groove applications
• Silicone compound offers good weather and ozone resistance
• Compatible with oils, chemicals, and solvents in moderate-exposure environments
• Sold in a pack of 5 for replacement or service stock

Compatibility

Designed as an OEM-style replacement or service seal for equipment accepting Dash 255 O-rings, including flanged fittings, pump housings, and HVAC system components requiring a 5.625-inch ID silicone seal.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or mechanical maintenance personnel. Shut down and depressurize the system fully before removing the old O-ring or seating the replacement. Inspect the groove for burrs or corrosion that could compromise the seal. Do not roll or twist the O-ring during installation; seat it evenly in the groove before pressurizing the system.