Value Collection ZMSCS70429 Silicone O-ring Dash 429 5in Id

Product Description

The VALUE COLLECTION ZMSCS70429 is a round cross-section silicone O-ring sized at 5 inches inside diameter, 5.5 inches outside diameter, and 0.25 inches thick, conforming to Dash Number 429. Rated at 70 Shore hardness, this white silicone O-ring is engineered for applications that demand a wide service temperature range, spanning -80 degrees F to 450 degrees F. It offers good dry heat resistance, weather resistance, and ozone resistance. Plumbers, HVAC technicians, and industrial maintenance professionals use this seal where standard Buna-N or EPDM compounds fall short due to extreme thermal conditions.

This O-ring is suited for use in residential and light commercial plumbing, HVAC systems, and industrial equipment where sealing against oils, chemicals, and solvents is required. Its silicone compound is well matched to dry heat environments, outdoor exposure, and ozone-heavy conditions. It is not recommended for applications involving prolonged heavy oil immersion where nitrile or fluorosilicone compounds would be preferred. Each package contains 5 O-rings.

Key Features

• Silicone compound with a wide service temperature range of -80 degrees F to 450 degrees F
• Dash 429 sizing: 5 inches ID, 5.5 inches OD, 0.25 inches thick, round cross section
• 70 Shore hardness (Hard rating) for firm sealing under compression
• Good weather and ozone resistance for outdoor or exposed installations
• Compatible with oils, chemicals, and solvents in limited-exposure conditions
• Sold in a pack of 5 to support service stock and job-site use

Compatibility

Designed as an OEM-style replacement or service seal for any application requiring a Dash 429 silicone O-ring with a 5 inches inside diameter, 5.5 inches outside diameter, and 0.25 inches thickness in a round cross-section profile.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial maintenance technicians. Before replacing any O-ring, shut off and depressurize the system and allow all components to reach ambient temperature. Lightly lubricate the O-ring with a compatible lubricant prior to seating to prevent tearing or rolling during assembly. Verify that the groove dimensions match the Dash 429 standard before installation.