Value Collection ZMSCH70316 O-ring Dash 316 Nitrile 50pk

Product Description

The VALUE COLLECTION ZMSCH70316 is a Dash 316 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in sealing applications. It measures 0.875 inches inside diameter, 1.25 inches outside diameter, and 0.1875 inches thick with a round cross section. Rated at 70 Shore A hardness, this O-ring is engineered for reliable static and dynamic sealing in systems that handle petroleum-based fluids, hydraulic oils, and fuels. Licensed HVAC technicians, plumbers, and fluid-system mechanics reach for Buna-N O-rings as a go-to general-purpose seal across a wide range of pressures and temperatures. Sold in packs of 50 to support bench stock and service van inventory.

This O-ring is appropriate for residential and commercial HVAC, plumbing, hydraulic, and pneumatic applications wherever petroleum-product compatibility is required. The Buna-N compound provides excellent resistance to petroleum fluids, compressor oils, and fuels, making it a common choice for refrigerant-oil-side fittings, hydraulic cylinders, valve stems, and pump housings. It is not recommended for use with ozone-generating environments, direct sunlight exposure, or systems running synthetic esters or phosphate-ester fluids. The Dash 316 designation follows standard AS568 sizing for straightforward cross-referencing in field or shop settings.

Key Features

• Buna-N (Nitrile Butadiene Rubber) compound — excellent resistance to petroleum products, fuels, and hydraulic oils
• 70 Shore A hardness rating — hard durometer suitable for dynamic and static sealing under moderate pressure
• Round cross section — consistent compression and predictable sealing in standard O-ring grooves
• Operating temperature range: -40 degrees F to 250 degrees F
• Meets SAE and MIL-Spec standards for broad application acceptance
• Pack of 50 — supports bulk service inventory and reduces per-unit cost on high-use seals

Compatibility

Compatible with petroleum products, hydraulic oils, fuels, and similar mineral-based fluids. Not intended for use with ozone-rich environments or exposure to direct sunlight during storage. Should not be used in systems containing fluids incompatible with Nitrile Butadiene Rubber. FDA approval is not confirmed for this part.

Installation Notes

Installation of O-rings should be performed by a qualified technician familiar with the sealing system being serviced. Always depressurize and de-energize the system before replacing seals, and verify the groove dimensions match the Dash 316 specification prior to installation. Lightly lubricating the O-ring with a compatible fluid during assembly helps prevent twisting and nicking. Do not store Buna-N O-rings near motors, ozone-generating equipment, or in direct sunlight, as ozone and UV exposure degrade the compound over time.