Value Collection ZMSCH90338 O-ring Dash 338 Nbr Pack 25

Product Description

The VALUE COLLECTION ZMSCH90338 is a Dash 338 O-ring made from Nitrile Butadiene Rubber (Buna-N), one of the most widely used elastomers in fluid sealing applications. It measures 3.125 inches inside diameter, 3.5 inches outside diameter, and 0.1875 inches in cross-section thickness. The durometer rating is 90, placing it in the extra-hard hardness category. This O-ring is designed to maintain a reliable seal under compression in hydraulic, pneumatic, and fluid-handling systems. It is sold in a package quantity of 25 and is appropriate for plumbing, HVAC, and industrial maintenance professionals who require a standard Dash 338 sealing element.

This O-ring is suited for use in residential and commercial applications where petroleum-based fluids are present, including hydraulic systems, fuel handling equipment, and general fluid control assemblies. The Buna-N compound delivers strong resistance to petroleum products, oils, and fuels. It operates reliably across a temperature range of -40 degrees F to 250 degrees F, making it appropriate for a broad range of service conditions encountered in mechanical and trade service work. The black round cross-section profile fits standard Dash 338 grooves per SAE and MIL-Spec dimensional standards.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction offers excellent resistance to petroleum products, oils, and fuels
• Extra-hard 90 durometer rating provides strong compression set resistance and reduced extrusion risk
• Operating temperature range of -40 degrees F to 250 degrees F suits a wide range of service environments
• Round cross-section profile conforms to SAE and MIL-Spec dimensional standards for Dash 338 O-rings
• Tear and abrasion resistance supports durability in high-cycle or high-pressure applications
• Sold in a pack of 25 for maintenance stock or multi-unit service work

Compatibility

Designed as a standard Dash 338 O-ring replacement compatible with petroleum-based fluid systems. Not recommended for use with ozone-generating environments, direct sunlight exposure, or applications requiring FDA-approved materials, as this part is not FDA approved.

Installation Notes

Installation should be performed by a qualified plumber, HVAC technician, or mechanical trade professional. Always depressurize and drain the system before removing the existing O-ring to prevent fluid release or injury. Inspect the mating groove for damage, contamination, or wear before seating the new O-ring. Avoid storing Buna-N O-rings near motors, electrical equipment, or direct sunlight, as ozone and UV exposure can degrade the elastomer over time.