Value Collection ZMSCS70129 Silicone O-ring Dash 129 25-pack

Product Description

The VALUE COLLECTION ZMSCS70129 is a silicone O-ring with a round cross section, designed for static and dynamic sealing applications where wide temperature range performance is required. It measures 1.563 inches inside diameter, 1.750 inches outside diameter, and 0.094 inches thick, conforming to Dash 129 sizing standards. With a hardness rating of 70 Shore A and a service range of -80 degrees F to 450 degrees F, this O-ring is suited for installations demanding reliable dry heat resistance and resilience against weather and ozone degradation. Licensed HVAC technicians, plumbers, and mechanical contractors commonly source this size for sealing ports, valves, fittings, and equipment housings.

This O-ring is applicable in residential and light commercial HVAC systems, plumbing assemblies, fluid handling equipment, and general mechanical applications where silicone elastomer seals are specified. It performs well in environments exposed to oils, chemicals, and solvents at moderate concentrations. The Dash 129 designation makes it straightforward to cross-reference against standard O-ring sizing charts used by service technicians in the field. This item is packaged in a quantity of 25 per pack, making it practical for service fleets or shop stock replenishment.

Key Features

• Dash 129 standard sizing: 1.563 inches ID, 1.750 inches OD, 0.094 inches thick
• Silicone material rated for service from -80 degrees F to 450 degrees F
• 70 Shore A hardness for firm, reliable compression sealing
• Round cross section for consistent groove fit and uniform sealing load
• Resistant to weather, ozone, and dry heat; limited resistance to oils and solvents
• Pack of 25 units for shop stock or multi-unit service calls

Compatibility

Designed as a standard Dash 129 silicone O-ring suitable for use in equipment, valves, fittings, and assemblies that specify this dimensional standard. Compatible with oils, chemicals, and solvents at moderate concentrations per manufacturer guidance.

Installation Notes

Installation is typically performed by HVAC technicians, plumbers, or mechanical service professionals. Always depressurize and isolate the system before replacing an O-ring seal. Inspect the groove for burrs, debris, or damage before seating the new ring. Avoid over-stretching the O-ring during installation, as silicone elastomer can tear if overstressed.