Value Collection ZMSCH70907 O-ring Dash 907 Nbr 70A

Product Description

The VALUE COLLECTION ZMSCH70907 is a Dash 907 O-ring manufactured from Nitrile Butadiene Rubber (Buna-N), the most widely used elastomer in fluid-sealing applications. It measures 0.53 inches inside diameter, 0.694 inches outside diameter, and 0.082 inches thick with a round cross section. Rated at 70 Shore A hardness, this O-ring delivers strong resistance to petroleum-based fluids along with reliable compression set, tear resistance, and abrasion resistance. The operating temperature range spans -40 degrees F to 250 degrees F, making it suited for a broad range of mechanical and fluid system service conditions. Sold in packs of 100.

This O-ring is used primarily as a boss gasket for straight-thread tube fittings, sealing hydraulic and pneumatic ports in HVAC equipment, plumbing assemblies, fuel systems, and general industrial fluid circuits. Compatible materials include petroleum products, mineral-based hydraulic oils, and similar hydrocarbon fluids. Installers in HVAC, plumbing, and industrial maintenance will encounter this size across a wide range of port fittings and valve bodies requiring a Dash 907 seal. The black Buna-N construction is standard for petroleum-service O-ring boss applications.

Key Features

• Buna-N (Nitrile Butadiene Rubber) material with excellent petroleum product resistance
• Dash 907 designation: 0.53 inches ID, 0.694 inches OD, 0.082 inches thick
• 70 Shore A hardness rating for reliable sealing under compression
• Operating range: -40 degrees F to 250 degrees F
• Round cross section boss gasket for straight-thread tube fittings
• Meets SAE and MIL-Spec standards

Compatibility

Designed as an O-ring boss gasket for straight-thread tube fittings requiring a Dash 907 Buna-N seal. Compatible with petroleum products and mineral-based hydraulic fluids. Not recommended for exposure to ozone, direct sunlight, or proximity to motors or electrical equipment that generate ozone during storage or service.

Installation Notes

Installation is typically performed by licensed HVAC technicians, plumbers, or industrial maintenance technicians. Depressurize and drain the system before disturbing any fitting or port seal. Inspect the seating surface for nicks or burrs before seating the O-ring, and apply a compatible lubricant to the O-ring before assembly to prevent pinching or rolling during torque-up. Do not store Buna-N O-rings in direct sunlight or near motors or other electrical equipment that may generate ozone, as ozone degrades nitrile rubber.