Value Collection ZMSCS70372 Silicone O-ring Dash 372

Product Description

The VALUE COLLECTION ZMSCS70372 is a round cross-section silicone O-ring sized to Dash 372 standards, with an inside diameter of 8.75 inches, an outside diameter of 9.125 inches, and a thickness of 0.1875 inches. Rated at 70 Shore A hardness, this O-ring is manufactured from silicone compound suited for static and dynamic sealing applications where a wide service temperature range is required. Operating range spans -80 degrees F to 450 degrees F, making it appropriate for systems exposed to dry heat cycling, outdoor weathering, and ozone exposure. Plumbers, HVAC technicians, and industrial maintenance professionals install this style of large-diameter O-ring in flanged connections, pump housings, and equipment covers.

This O-ring is suited for sealing applications involving oils, chemicals, and solvents at a general-use level, though oil resistance is noted as limited. Its white silicone construction provides good weather and ozone resistance, making it a practical choice for both indoor mechanical assemblies and outdoor equipment enclosures. The Dash 372 designation follows standard AS568 sizing conventions, commonly referenced in plumbing, HVAC, pool equipment, and general industrial maintenance. Each unit is sold and packaged individually.

Key Features

• Dash 372 standard sizing: 8.75 inches ID, 9.125 inches OD, 0.1875 inches thick
• Silicone material rated for -80 degrees F to 450 degrees F service temperature range
• 70 Shore A hardness for firm, reliable sealing under compression
• Good resistance to weather, ozone, and dry heat cycling
• Round cross-section profile for use in standard O-ring grooves
• Compatible with oils, chemicals, and solvents at limited to moderate exposure levels

Compatibility

Designed as an OEM-style replacement or service seal for large-bore flanged connections, pump covers, and equipment housings that accept a standard Dash 372 O-ring groove specification.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial mechanics. Before installation, de-energize or depressurize the system and verify the mating groove is clean, dry, and free of damage. Lightly lubricate the O-ring with a compatible lubricant to seat it evenly without twisting or rolling. Do not stretch or pinch the ring during seating, as uneven cross-section compression will reduce seal integrity.