Value Collection ZMSCH70386 O-ring Dash 386 Nitrile

Product Description

The VALUE COLLECTION ZMSCH70386 is a Dash 386 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid sealing applications. It measures 17 inches inside diameter, 17.375 inches outside diameter, and 0.1875 inches (3/16 inches) thick with a round cross section. Durometer hardness is rated at 70, placing it in the hard hardness category. The compound delivers excellent resistance to petroleum-based fluids along with strong compression set performance and good tear and abrasion resistance. Plumbers, HVAC technicians, and industrial maintenance professionals install this part in hydraulic, pneumatic, and fluid systems where a reliable face or radial seal is required.

This O-ring is suited for use in residential and commercial systems that involve petroleum-based media, hydraulic fluids, and similar hydrocarbon-compatible fluids. Its temperature range spans -40 degrees F to 250 degrees F, making it appropriate for a broad range of service conditions. It is not recommended for exposure to ozone-generating equipment or direct sunlight during storage. The part is sold in a package quantity of 5 and meets SAE and MIL-Spec standards. Typical applications include pump seals, valve bodies, fittings, and manifold assemblies where a standard Dash 386 profile is called out.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction with excellent resistance to petroleum products and hydrocarbon-based fluids
• 70 durometer hardness rating provides firm sealing with controlled compression set
• Operating temperature range of -40 degrees F to 250 degrees F suits a wide range of HVAC, plumbing, and hydraulic applications
• Round cross section conforms to standard Dash 386 dimensional specifications per SAE and MIL-Spec
• Black color for visual confirmation during installation inspection
• Sold in a package of 5 units, minimum order quantity of 1

Compatibility

Designed as an OEM-style replacement or maintenance seal for any application calling out a standard Dash 386 O-ring with Buna-N material. Compatible with petroleum products and hydrocarbon-based fluids. Not compatible with ozone-rich environments or applications requiring FDA-approved materials.

Installation Notes

Plumbers, HVAC technicians, and hydraulic system technicians install this part. Always depressurize and isolate the system before removing old seals or installing new ones. Lubricate the O-ring with a compatible fluid before seating to reduce the risk of twisting or tearing during assembly. Do not store unused O-rings in direct sunlight or near motors and other electrical equipment that may generate ozone, as this degrades Buna-N compound over time.