Value Collection ZMSCH2.4X5.3 O-ring 5.3in Id Nbr 100pk

Product Description

The VALUE COLLECTION ZMSCH2.4X5.3 is a Buna-N (Nitrile Butadiene Rubber) O-ring designed for sealing applications across HVAC, plumbing, hydraulic, and fluid-handling systems. With a 5.3-inch inside diameter, 10.1-inch outside diameter, and 2.4-inch thickness, this large-profile O-ring features a round cross section and a Shore hardness of 70. Rated for service from -40 degrees F to 250 degrees F, it delivers dependable sealing in systems carrying petroleum-based fluids, oils, and fuels. It meets SAE and MIL-Spec standards and is sold in packs of 100, making it well-suited for shop stock and service fleet applications.

This O-ring is appropriate for use in residential and commercial HVAC equipment, plumbing assemblies, hydraulic components, and industrial fluid systems where petroleum-product compatibility is required. The Buna-N compound offers excellent compression set resistance along with strong tear and abrasion resistance, which supports long service life in dynamic and static sealing scenarios. Plumbers, HVAC technicians, and hydraulic system mechanics regularly stock this size for pump seals, valve bodies, and manifold connections. Avoid exposure to ozone-generating sources such as electric motors during storage.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound — the most widely used O-ring elastomer for petroleum-product compatibility
• Operating temperature range of -40 degrees F to 250 degrees F
• Shore hardness of 70 for a hard, resilient seal under compression
• Round cross section for consistent seating in standard O-ring grooves
• Meets SAE and MIL-Spec standards
• Sold in a 100-piece pack — practical for shop stock and bulk service use

Compatibility

Compatible with petroleum products, oils, and fuels. Designed as a standard Buna-N O-ring replacement for pumps, valves, and hydraulic or fluid-handling assemblies requiring a 5.3-inch inside diameter round-cross-section seal.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic equipment mechanics. Always depressurize and de-energize the system before removing or installing O-rings. Lightly lubricate the O-ring with a compatible fluid or grease during installation to prevent rolling or pinching in the groove. Do not store O-rings in direct sunlight or near motors and other equipment that may generate ozone, as this degrades the elastomer.