Value Collection ZMSCE70350 Epdm O-ring Dash 350 Pack 12

Product Description

The VALUE COLLECTION ZMSCE70350 is a Dash 350 EPDM O-ring designed for static and dynamic sealing applications in fluid and thermal systems. Constructed from Ethylene Propylene Diene Monomer (EPDM) rubber with a round cross section and a 70 Shore A hardness rating, this O-ring provides reliable sealing across a broad temperature range of -65 degrees F to 300 degrees F. It measures 4.625 inches inside diameter, 5.000 inches outside diameter, and 0.1875 inches (3/16 inches) thick. Licensed tradespeople and maintenance technicians install these in systems handling hot water, steam, and phosphate ester hydraulic fluids. Sold in a package quantity of 12.

This O-ring is suited for commercial and industrial sealing applications where hot water, steam, or phosphate ester hydraulic fluids are present. It is specifically noted for excellent resistance to Skydrol fluids used in commercial aircraft hydraulic systems, making it relevant for aerospace ground support and MRO environments. EPDM material also makes this a practical choice for plumbing, HVAC hydronic systems, and any application requiring consistent performance at elevated temperatures. The package quantity of 12 supports stocking and service kit assembly.

Key Features

• EPDM construction rated for service from -65 degrees F to 300 degrees F
• 70 Shore A hardness for a firm, reliable seal under compression
• Round cross section, Dash 350 standard sizing for consistent fitment
• Excellent resistance to Skydrol fluids used in commercial aircraft hydraulic systems
• Compatible with hot water, steam, and phosphate ester type hydraulic fluids
• Sold in a package of 12 to support service stock and kit builds

Compatibility

Compatible with systems handling hot water, steam, and phosphate ester type hydraulic fluids, including applications requiring resistance to Skydrol fluids in commercial aircraft hydraulic systems. Designed as an OEM-style replacement or service O-ring for any application calling for a Dash 350 EPDM seal with a 4.625-inch inside diameter and 5.000-inch outside diameter.

Installation Notes

O-ring installation should be performed by a qualified technician with the system fully depressurized and fluid supply shut off before disassembly. Inspect the seating groove for damage, debris, or corrosion before installing the new O-ring. Lubricate the O-ring with a fluid compatible with EPDM material to prevent tearing during assembly. Avoid using petroleum-based lubricants, as they are incompatible with EPDM and will cause degradation.