Value Collection ZMSCH70112 O-ring Dash 112 Nbr 100-pack

Product Description

The VALUE COLLECTION ZMSCH70112 is a Dash 112 Nitrile Butadiene Rubber (NBR/Buna-N) o-ring sold in packs of 100. It features a round cross-section with a 0.500-inch inside diameter, 0.688-inch outside diameter, and a 0.094-inch thickness. Rated at 70 Shore A hardness, this o-ring is engineered for static and dynamic sealing applications across HVAC, plumbing, and hydraulic systems. It is installed by licensed HVAC technicians, plumbers, and mechanical contractors working on fluid and gas handling assemblies where reliable sealing against petroleum-based media is required.

This o-ring is well suited for use in residential and commercial applications involving petroleum-based fluids, oils, fuels, and hydraulic media. Its Buna-N elastomer compound delivers strong resistance to compression set, tearing, and abrasion, making it a dependable choice for valve stems, fittings, pump seals, and refrigeration service connections. The operating temperature range of -40 degrees F to 250 degrees F covers most mechanical service environments found in HVAC, plumbing, and light industrial settings. Each pack contains 100 pieces, supporting shop stock and field service kits.

Key Features

• Buna-N (NBR) elastomer — the most widely used o-ring material, with excellent resistance to petroleum products
• 0.500-inch ID, 0.688-inch OD, 0.094-inch thickness — standard Dash 112 sizing
• 70 Shore A hardness — rated Hard, suitable for moderate-pressure sealing applications
• Operating range of -40 degrees F to 250 degrees F for broad service compatibility
• Round cross-section provides consistent sealing contact in standard o-ring grooves
• Meets SAE and MIL-Spec standards; sold in 100-piece packs for shop and field restocking

Compatibility

Compatible with petroleum products, oils, fuels, and hydraulic fluids. Designed for use in standard Dash 112 o-ring grooves across HVAC, plumbing, hydraulic, and mechanical assemblies. Not FDA approved; not recommended for use with ozone-generating environments or direct UV exposure.

Installation Notes

O-rings of this type are installed by HVAC technicians, plumbers, and mechanical contractors during valve, pump, and fitting service. De-pressurize and isolate the system fully before replacing any sealing component. Lubricate the o-ring with a compatible fluid or o-ring lubricant before seating to prevent tearing during assembly. Store unused o-rings away from direct sunlight and electrical equipment that may generate ozone, which degrades NBR elastomers over time.