Value Collection ZMSCH90326 O-ring Dash 326 Nbr 90D

Product Description

The VALUE COLLECTION ZMSCH90326 is a Dash 326 nitrile butadiene rubber (Buna-N) O-ring used to create static or dynamic fluid seals in hydraulic, pneumatic, and mechanical assemblies. It measures 1.625 inches inside diameter, 2 inches outside diameter, and 0.1875 inches thick with a round cross section. The compound is rated at 90 durometer, placing it in the extra-hard hardness range, and the material is compatible with petroleum-based fluids. The operating temperature range spans -40 degrees F to 250 degrees F. Plumbers, hydraulic technicians, and mechanical service pros use these seals when servicing pumps, valves, fittings, and fluid-power components.

This O-ring is suited for residential and commercial applications involving petroleum-based lubricants, hydraulic oils, fuels, and similar media. Common install scenarios include pump shaft seals, valve stem packing grooves, cylinder end caps, and threaded port face seals. The Dash 326 designation follows the AS568 standard sizing system, making it straightforward to cross-reference against existing groove specifications. The Buna-N compound is the most widely used O-ring elastomer in trade applications due to its resistance to petroleum products, good compression set performance, and acceptable tear and abrasion resistance.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound rated for petroleum product compatibility
• 90 durometer extra-hard hardness for high-pressure sealing applications
• Operating range of -40 degrees F to 250 degrees F
• Dash 326 sizing per AS568 standard: 1.625 inches ID x 2 inches OD x 0.1875 inches thick
• Meets SAE and MIL-Spec standards
• Round cross section for reliable groove fit and consistent seal compression

Compatibility

Compatible with petroleum products including hydraulic oils, fuels, and lubricants. Designed as an OEM-style replacement or service seal for any application specifying a Dash 326 Buna-N O-ring. Should not be used with ozone-generating environments or in direct sunlight storage conditions. FDA approved: No.

Installation Notes

Installation is performed by licensed plumbers, hydraulic technicians, or mechanical service professionals. Always depressurize and de-energize the system before removing the old seal and installing the replacement. Clean the groove thoroughly and inspect for surface damage before seating the new O-ring. Avoid twisting the O-ring during installation; use a compatible lubricant to ease seating without compromising seal integrity.