Mutual Screw & Supply

0.139" CS X 7.984" ID Buna-N Nitrile O-Rings | AS568-268 | Dash 268 | 70 Durometer | Black (40 / Pkg.)

0.139" CS X 7.984" ID Buna-N Nitrile O-Rings | AS568-268 | Dash 268 | 70 - Main image
$34.63 $50.92 In stock

Buna-N Nitrile o-rings in AS568-268, 7.984" inner diameter by 0.139" cross-section. Service range -40°F to +250°F (-40°C to +121°C). Also known as NBR, Buna-N, Chemigum, Hycar, Perbunan.

Specifications

  • Product type: O-Ring
  • Material: Buna-N Nitrile
  • AS568 dash size: 268
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 7.984" (202.79 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 40 per package
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Miles ★★★★★

The 0.139" cross-section fit perfectly into the groove on my pressure washer pump. It seals nicely at 250°F, which was a worry with cheaper alternatives I've tried. For the price of a 40-pack, this was a no-brainer.

Christopher D. ★★★★★

Needed a reliable o-ring for a hydraulic cylinder rebuild, and the 70 durometer material held up perfectly under pressure. The 0.139" cross-section fit the groove snugly, no leaks at all. Exactly what I needed for the job.

Leo ★★★★★

The 7.984" inner diameter slipped onto my pulley shaft without any wrestling match, and the 70 durometer grips firmly enough that I didn’t need a drop of sealant. These Buna-N rings arrived with a clean, uniform surface—no flash or rough edges—and the package count matched exactly, so I’ve already g