Value Collection ZMSCS70049 Silicone O-ring Dash 049

Product Description

The VALUE COLLECTION ZMSCS70049 is a round-cross-section silicone O-ring designed for static and dynamic sealing applications across a wide range of industries. With a 5-inch inside diameter, 5.125-inch outside diameter, and 0.0625-inch wall thickness, this Dash 049 O-ring meets standard AS568 sizing conventions. The silicone compound delivers a broad service temperature range of -80 degrees F to 450 degrees F, making it a reliable choice for applications that demand both cold flexibility and high-heat resistance. Licensed trades and maintenance professionals stock these for sealing flanges, housings, and threaded connections where temperature cycling is a factor. Each package contains 10 O-rings.

This O-ring is suited for use in HVAC equipment, plumbing systems, fluid-handling assemblies, and industrial machinery where silicone elastomer is the specified compound. Silicone performs well in dry-heat environments and resists weathering and ozone degradation. It offers limited oil resistance, so it is not the preferred choice for continuous petroleum-based fluid immersion. Compatible materials include oils in intermittent service, chemicals, and solvents where silicone is rated acceptable. Technicians working on gasket replacements, pump housings, or valve bodies will find this Dash 049 size a commonly specified dimension.

Key Features

• Wide service temperature range from -80 degrees F to 450 degrees F suits demanding thermal environments
• Round cross section conforms to standard Dash 049 AS568 sizing at 5 inches ID and 5.125 inches OD
• Silicone compound provides good weather and ozone resistance for outdoor or exposed installations
• 70 durometer hardness rating classified as hard for positive sealing under compression
• Sold in a 10-piece package to support service calls and stocking requirements
• Not FDA approved — confirm suitability before use in food-contact or potable-water applications

Compatibility

Compatible with oils, chemicals, and solvents in applications requiring wide temperature range tolerance and good dry heat resistance; note that oil resistance is limited and this compound is not recommended for continuous petroleum immersion. Designed as a standard Dash 049 replacement O-ring for any assembly specifying a 5-inch ID silicone seal.

Installation Notes

Installation should be performed by a qualified technician following the equipment manufacturer's service procedures. Depressurize and isolate the system fully before removing any existing seal. Inspect the gland and mating surfaces for scoring or contamination before seating the new O-ring. Avoid twisting or pinching the ring during installation; lubricate with a compatible silicone-based lubricant to ease seating and reduce the risk of damage.