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Black rectangular Buna-N O-rings in bulk pack of 100

Zoro Select

Zoro Select Buna-N O-Ring Dash 011 PK100

SKU CH-092C-BAEC5

Pack of 100 square-profile Buna-N O-rings, dash 011, 70A durometer, FDA-approved for -40 to 250 °F

  • FDA-approved material for food-safe sealing
  • Medium-hard 70A durometer resists extrusion under pressure
  • Square profile ensures even compression in grooves
  • Wide -40 °F to 250 °F temperature range suits extreme environments
  • Pack of 100 covers high-volume maintenance needs

Zoro Select Buna-N O-Ring Dash 011

This pack contains 100 Buna-N O-rings sized to Dash 011 for sealing applications. They suit maintenance technicians and engineers who need a reliable supply of standard inch-dimension seals. The rectangular cross-section profile fits corresponding grooves in hydraulic and pneumatic assemblies. Each ring is black and made from nitrile rubber.

FDA approved material with 70A durometer

The Buna-N compound carries FDA approval for incidental food contact and has a 70A durometer hardness rating. This medium-hard specification determines whether the seal meets the required extrusion resistance and chemical compatibility for a given fluid system. The material is metal detectable but not X-ray detectable.

Temperature range from -40 to 250 degrees F

The seals operate continuously across a range of -40 to 250 degrees F, covering most general-purpose industrial environments. They handle common hydraulic oils, water and air lines within this window. The compound reaches its limit with aggressive solvents, high-temperature steam or prolonged exposure above the rated maximum.

Highlights

  • FDA-approved material for food-safe sealing
  • Medium-hard 70A durometer resists extrusion under pressure
  • Square profile ensures even compression in grooves
  • Wide -40 °F to 250 °F temperature range suits extreme environments
  • Pack of 100 covers high-volume maintenance needs

Specifications

BrandZORO SELECT

Questions about this item

What does the 0.3 in inside diameter mean for the groove I machine?

The actual inside diameter is 0.3 in and the actual cross-section width is 0.07 in, so the groove should be sized to those dimensions for a proper seal.

How does the rectangular cross-section affect the seal compared to a round one?

The rectangular profile provides a larger sealing contact area and resists rolling in the groove, which helps maintain a consistent seal under pressure.

What groove width and depth do I need for this dash 011 ring?

Design the groove for an actual width of 0.07 in and an actual outside diameter of 0.441 in to match the ring's rectangular cross-section.

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