Value Collection ZMSCH70232 O-ring Dash 232 Nbr 50 Pack

Product Description

The VALUE COLLECTION ZMSCH70232 is a Dash 232 Nitrile Butadiene Rubber (NBR/Buna-N) O-ring with a 2.75-inch inside diameter, 3-inch outside diameter, and 0.125-inch (1/8 inch) round cross section. Sold in a pack of 50, this O-ring is designed for static and dynamic sealing applications involving petroleum-based fluids and oils. It carries a Shore A hardness rating of 70 and is rated for service from -40 degrees F to 250 degrees F. Buna-N is the most widely used O-ring elastomer in the trade, valued for its excellent compression set resistance and strong abrasion and tear resistance. Licensed plumbers, HVAC technicians, and fluid-system technicians commonly specify this compound for fuel, oil, and hydraulic sealing applications.

This O-ring is suited for use in residential and commercial plumbing, HVAC, and industrial fluid-handling systems where petroleum-product exposure is a primary concern. The Dash 232 designation follows standard AS568 sizing, making it a direct fit for any groove or port machined to that specification. Compatible with petroleum products including oils, fuels, and hydraulic fluids. Not recommended for exposure to ozone-generating environments such as those near electric motors, or for prolonged direct sunlight storage, as either condition can degrade NBR material over time.

Key Features

• Buna-N (NBR) elastomer — the most broadly compatible O-ring material for petroleum-fluid service
• Dash 232 standard sizing: 2.75 inches ID, 3 inches OD, 0.125 inches thick round cross section
• Shore A hardness of 70 — rated Hard, providing strong compression set resistance
• Temperature range: -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards
• Pack of 50 units — suitable for stocking, fleet service, or multi-unit repair jobs

Compatibility

Compatible with petroleum products including oils, fuels, and hydraulic fluids. Designed to fit any application or fitting groove machined to the AS568 Dash 232 O-ring standard. Not FDA approved; not intended for direct food-contact or potable-water service without verification of local code requirements.

Installation Notes

Shut down and depressurize the system fully before removing or installing any O-ring seals. Lubricate the O-ring with a compatible petroleum-based or system-fluid lubricant prior to installation to reduce the risk of tearing during assembly. Avoid installing this NBR compound in systems containing ozone, strong oxidizers, ketones, esters, or chlorinated solvents, as these will degrade the material. Licensed plumbers and HVAC technicians should verify that the groove dimensions conform to AS568 Dash 232 tolerances before installation.