Value Collection ZMSCH70207 O-ring Dash 207 Buna-n Pack 100

Product Description

The VALUE COLLECTION ZMSCH70207 is a Dash 207 Buna-N nitrile butadiene rubber o-ring designed for sealing applications in fluid and pneumatic systems. It measures 0.563 inches inside diameter, 0.813 inches outside diameter, and 0.125 inches thick with a round cross section. Rated at 70 Shore A hardness, this o-ring handles temperatures 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 resistance to petroleum-based fluids, strong compression set performance, and good tear and abrasion resistance. Plumbers, HVAC technicians, and hydraulic system technicians commonly specify this material for fuel, oil, and refrigerant-adjacent sealing tasks.

This o-ring is suited for residential and light commercial plumbing, HVAC, hydraulic, and pneumatic sealing applications where contact with petroleum products is expected. The Dash 207 designation is a standard AS568 sizing reference, making it straightforward to cross-reference into existing seal kits and repair assemblies. Each order ships in a pack of 100, supporting shop stock and service van inventory for repeated repair use. It is not FDA approved and should not be substituted in potable water or food-contact applications without verifying local code compliance.

Key Features

• Buna-N (nitrile butadiene rubber) construction with excellent petroleum product resistance
• 70 Shore A hardness rating for reliable compression set under operating loads
• Operating temperature range of -40 degrees F to 250 degrees F
• Round cross section, 0.125 inches thick, Dash 207 standard sizing
• Meets SAE and MIL-Spec standards
• Pack of 100 for shop stock and field inventory replenishment

Compatibility

Compatible with petroleum-based products and fluids. Designed for use in systems where Dash 207 standard AS568 o-ring sizing is specified. Not recommended for contact with ozone, direct sunlight exposure during storage, or environments that generate ozone such as those near electric motors or other electrical equipment.

Installation Notes

Installation is typically performed by licensed plumbers, HVAC technicians, or hydraulic system technicians. Always depressurize and de-energize the system before removing or replacing any seal. Inspect the mating groove for burrs, corrosion, or damage before seating the new o-ring. Avoid twisting the o-ring during installation, and use a compatible lubricant approved for the media being sealed.