Value Collection ZMSCH70133 O-ring Dash 133 Nbr Pack of 100

Product Description

The VALUE COLLECTION ZMSCH70133 is a Dash 133 Nitrile Butadiene Rubber (NBR/Buna-N) O-ring with a round cross section, measuring 1.813 inches inside diameter, 2.000 inches outside diameter, and 3/32 inch (0.0937 inch) thickness. Rated at Shore A hardness of 70, this O-ring is designed for static and dynamic sealing applications across HVAC, plumbing, and fluid-handling systems. It carries compatibility with petroleum-based media and operates across a temperature range of -40 degrees F to 250 degrees F. Sold in a pack of 100 units, this SKU suits technicians who stock seals in bulk for recurring maintenance or multi-unit service calls.

This O-ring is suited for residential and light commercial applications where petroleum-based fluids, hydraulic oils, or mineral-based lubricants are present. Typical use cases include valve stem seals, pump housings, fitting connections, and manifold assemblies in HVAC refrigerant circuits, plumbing supply lines, and pool and spa equipment. The NBR compound is the most widely used O-ring elastomer in trade applications due to its broad chemical compatibility and reliable compression set performance.

Key Features

• Buna-N (NBR) elastomer offers excellent resistance to petroleum products and mineral-based fluids
• Shore A hardness of 70 provides a hard, durable seal with strong tear and abrasion resistance
• Operating temperature range of -40 degrees F to 250 degrees F suits a wide variety of service conditions
• Round cross section conforms to standard O-ring groove dimensions for Dash 133 sizing
• Meets SAE and MIL-Spec standards
• Pack of 100 units supports bulk stocking for field service and shop inventory

Compatibility

Compatible with petroleum products and mineral-based fluids. Designed as a standard Dash 133 replacement O-ring for use in valves, pumps, fittings, and manifolds across HVAC, plumbing, and fluid-handling equipment. Not recommended for exposure to direct sunlight, ozone sources, or ozone-generating electrical equipment during storage.

Installation Notes

O-ring installation is performed by licensed HVAC technicians, plumbers, and pipefitters depending on the application. Always depressurize and isolate the system before removing or installing seals, and confirm the groove dimensions match the Dash 133 standard before installing. Apply a light coat of compatible lubricant to the O-ring during assembly to reduce installation stress and prevent rolling. Avoid using sharp tools that may nick or cut the sealing surface.