Value Collection ZMSCH90108 O-ring Dash 108 Nbr Pack 100

Product Description

The VALUE COLLECTION ZMSCH90108 is a Dash 108 O-ring made from Nitrile Butadiene Rubber (Buna-N), one of the most widely used elastomers in industrial and mechanical sealing applications. It measures 0.25 inches inside diameter, 0.438 inches outside diameter, and 0.094 inches thick with a round cross section. Rated at 90 durometer (extra hard), this O-ring provides excellent compression set resistance along with strong tear and abrasion resistance. The temperature range spans -40 to 250 degrees F, making it suitable for a broad range of service conditions. Licensed trades and maintenance technicians working with hydraulic, pneumatic, and fluid systems rely on this standard AS568 dash size for reliable sealing performance.

This O-ring is used across residential and commercial HVAC, plumbing, refrigeration, and general mechanical applications wherever a Dash 108 sealing element is required. It is particularly well suited for use with petroleum-based fluids and oils, making it a common choice in compressor service, pump assemblies, valve bodies, and hydraulic fittings. The Buna-N formulation offers excellent resistance to petroleum products, fuels, and lubricating oils. Sold in a package quantity of 100, this item is well suited for shop stock or field service kits where multiple O-rings of this size are consumed regularly.

Key Features

• Buna-N (Nitrile Butadiene Rubber) construction with excellent resistance to petroleum products
• 90 durometer extra hard rating for strong compression set and sealing performance
• Dash 108 standard sizing: 0.25 inches ID, 0.438 inches OD, 0.094 inches thick
• Operating temperature range of -40 to 250 degrees F
• Meets SAE and MIL-Spec standards
• Package quantity of 100 units for shop stock or service kit replenishment

Compatibility

Compatible with petroleum products, lubricating oils, fuels, and hydraulic fluids. Designed as an OEM-style replacement Dash 108 O-ring for use in HVAC, plumbing, hydraulic, and general mechanical sealing applications where Buna-N elastomer material is specified. Note: Buna-N is not recommended for use with ozone-generating environments, direct sunlight exposure, or systems using incompatible solvents or glycol-based fluids.

Installation Notes

O-ring installation is performed by licensed HVAC technicians, plumbers, and maintenance mechanics depending on the application. Always depressurize and de-energize the system before replacing O-rings, and relieve any residual fluid pressure before disassembly. Inspect the seating groove for damage or debris before installing the new O-ring, and apply a compatible lubricant to ease installation and prevent pinching or rolling. Do not store unused Buna-N O-rings in direct sunlight or near motors and electrical equipment that may generate ozone, as this degrades the elastomer.