Value Collection ZMSCS70433 Silicone O-ring Dash 433 5-pack

Product Description

The VALUE COLLECTION ZMSCS70433 is a Dash 433 silicone O-ring designed for static and dynamic sealing applications that demand reliable performance across a wide temperature range. With a 5.5-inch inside diameter, 6-inch outside diameter, and 0.25-inch thickness, this round cross-section ring seals large-bore connections in plumbing, HVAC, chemical processing, and industrial equipment. The silicone compound carries a Shore A hardness of 70, providing a firm yet compressible seal. Each order includes a pack of 5 rings. Licensed plumbers, pipefitters, and maintenance technicians are the primary installers of this size class of O-ring.

This O-ring suits applications where components are exposed to elevated heat, dry heat cycles, weather, or ozone. The silicone material performs from -80 degrees F to 450 degrees F, making it appropriate for high-temperature plumbing flanges, HVAC ductwork connections, large-diameter valve bodies, and similar trade installations. It also offers limited resistance to oils, chemicals, and solvents. It is not FDA approved and should not be specified for food-contact or pharmaceutical applications without independent verification.

Key Features

• Dash 433 standard sizing: 5.5 inches ID, 6 inches OD, 0.25 inches thick
• Silicone compound rated from -80 degrees F to 450 degrees F continuous service
• Shore A 70 hardness — firm, hard rating for positive compression sealing
• Round cross section for consistent groove fit and uniform seal load
• Good resistance to weather and ozone degradation
• Sold in a pack of 5 rings per order

Compatibility

Designed as a standard Dash 433 O-ring replacement suitable for large-bore grooves requiring a 5.5-inch ID silicone seal in plumbing, HVAC, and industrial equipment applications.

Installation Notes

Installation should be performed by a licensed plumber, pipefitter, or qualified maintenance technician. Depressurize and de-energize the system and drain all fluid from the affected line before removing the old O-ring. Inspect the groove for burrs, corrosion, or damage before seating the new ring. Do not use petroleum-based lubricants on silicone O-rings; use a silicone-compatible lubricant only.