Value Collection ZMSCHB90430 O-ring Nbr 90 Duro Dash 8-430

Product Description

The VALUE COLLECTION ZMSCHB90430 is a rectangular cross-section O-ring manufactured from Nitrile Butadiene Rubber (NBR), sized at 5.125 inches inside diameter, 5.625 inches outside diameter, and 0.0937 inches thick. Rated at 90 durometer, this extra-hard seal is built for applications requiring firm compression resistance and reliable fluid sealing. The NBR compound delivers solid resistance to petroleum-based fluids, making it a dependable choice in hydraulic, pneumatic, and plumbing assemblies. Licensed plumbers, HVAC technicians, and industrial maintenance trades install this type of seal in flanged connections, valve bodies, and pump housings.

This O-ring suits static and low-motion dynamic sealing applications in residential and commercial systems. The Dash 8-430 designation identifies it within standard O-ring sizing systems, simplifying cross-reference when replacing worn or failed seals. The NBR material performs across a temperature range of -40 to 250 degrees F, covering most hydronic, refrigeration-adjacent, and fluid-handling environments where petroleum-based media is present. Sold in a package quantity of 5 units, it is practical for service technicians who carry spares or anticipate multiple seal replacements in a single job.

Key Features

• Nitrile Butadiene Rubber (NBR) construction resists petroleum-based fluids and oils
• 90 durometer extra-hard rating for firm compression sealing in demanding applications
• Rectangular cross-section profile per Dash 8-430 standard sizing
• Operating temperature range of -40 to 250 degrees F
• Package quantity of 5 units per order

Compatibility

Designed as a standard Dash 8-430 replacement O-ring for any assembly specifying a 5.125-inch ID, 5.625-inch OD, 0.0937-inch thick rectangular NBR seal at 90 durometer hardness.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or industrial mechanics during scheduled maintenance or component replacement. Before installing, isolate and depressurize the system fully and drain any residual fluid from the assembly. Inspect the mating groove and sealing surfaces for wear, scoring, or debris before seating the new O-ring. Avoid twisting the ring during installation, and use only compatible lubricants rated for NBR compounds and the media being sealed.