Value Collection ZMSCS70441 Silicone O-ring Dash 441

Product Description

The VALUE COLLECTION ZMSCS70441 is a silicone o-ring with a round cross section, sized at 7 inches inside diameter and 7.5 inches outside diameter with a 0.25 inch thickness. It carries a Dash 441 designation and a Shore hardness rating of 70 (Hard). Silicone construction gives this o-ring a wide serviceable temperature range from -80 degrees F to 450 degrees F, making it a practical choice for sealing applications that see significant thermal cycling or sustained elevated heat. It is sold individually and weighs 0.02 pounds. Plumbers, pipefitters, industrial maintenance technicians, and equipment service professionals commonly install this type of o-ring in static sealing applications across fluid and gas systems.

This o-ring is suited for use in applications requiring good dry heat resistance, weather resistance, and ozone resistance. It is rated for limited compatibility with oils and performs well with certain chemicals and solvents. Typical install scenarios include flanged connections, cap seals, and groove-seated static joints in industrial, HVAC, and plumbing equipment where large-diameter seals are needed. The white color and silicone material are common in food-adjacent and high-temperature industrial environments, though this specific o-ring is not FDA approved and should not be used in food-contact applications where FDA compliance is required.

Key Features

• Silicone material provides a working temperature range of -80 degrees F to 450 degrees F
• Dash 441 standard sizing: 7 inches ID, 7.5 inches OD, 0.25 inches thick
• Shore hardness of 70 (Hard) for firm, reliable sealing under compression
• Round cross section for standard groove fitment
• Good weather and ozone resistance extends service life in exposed or outdoor equipment
• Compatible with select chemicals and solvents; limited oil resistance

Compatibility

Designed as an OEM-style replacement or service seal for equipment requiring a Dash 441 silicone o-ring with a 7 inch inside diameter and round cross section. Compatible materials include oils, chemicals, and solvents as noted by the manufacturer.

Installation Notes

Installation is typically performed by licensed plumbers, pipefitters, or industrial maintenance technicians. Before replacing the o-ring, depressurize and drain the system or component being serviced to prevent fluid or gas release. Inspect the seating groove for nicks, corrosion, or debris before installing the new o-ring. Avoid using petroleum-based lubricants on silicone o-rings; use a silicone-compatible lubricant only if needed for assembly.