Value Collection ZMSCE70345 Epdm O-ring Dash 345 10 Pack

Product Description

The VALUE COLLECTION ZMSCE70345 is an EPDM (Ethylene Propylene Diene Monomer) O-ring with a round cross section, sized to Dash 345 standards. It measures 4 inches inside diameter, 4.375 inches outside diameter, and 0.1875 inches thick. With a hardness rating of 70 Shore A (Hard), this O-ring is engineered for demanding fluid-sealing applications where temperature extremes and aggressive media are a factor. Licensed plumbers, hydraulic system technicians, and industrial maintenance professionals install these in high-temperature water lines, steam systems, and phosphate ester hydraulic circuits. Each package contains 10 O-rings.

This O-ring is suited for residential and commercial applications involving hot water, steam, and phosphate ester type hydraulic fluids. It carries a noted compatibility with Skydrol fluids used in commercial aircraft hydraulic systems. The EPDM compound performs across a wide service temperature range, making it a practical choice for steam lines, hot-water plumbing assemblies, and hydraulic systems where petroleum-based seals would degrade. Packaged in quantities of 10, it supports both repair stock and maintenance kit builds.

Key Features

• EPDM compound offers excellent resistance to hot water, steam, and phosphate ester hydraulic fluids
• Compatible with Skydrol fluids used in commercial aircraft hydraulic systems
• Dash 345 standard sizing: 4 inches ID, 4.375 inches OD, 0.1875 inches thick
• 70 Shore A hardness (Hard) for reliable compression sealing under pressure
• Round cross section for consistent groove fit and uniform sealing contact
• Rated for service from -65 degrees F to 300 degrees F
• Packaged 10 per unit for efficient inventory management

Compatibility

Compatible with hot water, steam, and phosphate ester type hydraulic fluids, including Skydrol fluids used in commercial aircraft hydraulic systems. Designed as a Dash 345 standard O-ring for use in any groove or fitting engineered to that dash size.

Installation Notes

Installation is performed by licensed plumbers, hydraulic technicians, or qualified maintenance professionals. Always depressurize and drain the system before removing or installing O-rings to prevent injury and ensure a proper seal. Inspect the mating groove for burrs, corrosion, or damage before seating the new O-ring. Avoid using petroleum-based lubricants with EPDM compounds, as they can cause the material to swell and degrade.