Value Collection ZMSCH90902 O-ring Dash 902 Nitrile

Product Description

The VALUE COLLECTION ZMSCH90902 is a Dash 902 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in sealing applications across HVAC, plumbing, and fluid-system maintenance. It measures 0.239 inches inside diameter and 2.518 inches outside diameter with a 0.064-inch cross-section thickness. The compound is rated at 90 durometer, placing it in the extra-hard hardness range, and it maintains a reliable seal from -40 degrees F up to 250 degrees F. Its round cross-section profile and consistent dimensional tolerances make it a dependable replacement seal for trade professionals working on petroleum-fluid systems.

This O-ring is suited for use in residential and light commercial applications involving petroleum-based fluids, hydraulic systems, fuel lines, and pneumatic fittings. HVAC technicians, plumbers, and fluid-systems mechanics will encounter this size in compressor fittings, valve bodies, and threaded port connections where a static or low-motion seal is required. The Buna-N compound offers excellent resistance to petroleum products, strong compression set performance, and solid tear and abrasion resistance under normal service conditions. It should not be stored in direct sunlight or near motors or other electrical equipment that may generate ozone.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound delivers excellent resistance to petroleum-based fluids and lubricants
• 90 durometer extra-hard rating provides firm, stable sealing under compression
• Operating temperature range of -40 degrees F to 250 degrees F suits most HVAC and fluid-system environments
• Dash 902 standard sizing ensures dimensional interchangeability with OEM and aftermarket components
• Round cross-section with 0.064-inch thickness fits standard O-ring grooves designed for this dash number
• Meets SAE and MIL-Spec standards for sealing applications

Compatibility

Designed as a standard Dash 902 replacement O-ring for use in petroleum-product-compatible sealing applications including hydraulic, fuel, and pneumatic systems that call for a Buna-N elastomer with a 90 durometer hardness rating.

Installation Notes

Installation should be performed by a qualified technician familiar with sealing procedures for the applicable system. Always depressurize and isolate the line or component before removing the old O-ring or installing a replacement. Lightly lubricate the O-ring with a compatible petroleum-based or system-approved lubricant prior to seating to reduce the risk of tearing during assembly. Avoid using sharp tools that may nick the sealing surface or the O-ring itself.