Mutual Screw & Supply

0.139" CS X 6.109" ID Buna-N Nitrile O-Rings | AS568-259 | Dash 259 | 70 Durometer | Black (70 / Pkg.)

0.139" CS X 6.109" ID Buna-N Nitrile O-Rings | AS568-259 | Dash 259 | 70 - Main image
$34.8 $50.43 In stock

Buna-N Nitrile o-rings in AS568-259, 6.109" 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: 259
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 6.109" (155.17 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 70 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)

Emily ★★★★★

Perfect fit for my hydraulic cylinder rebuild—the 70 durometer feels sturdy but not too stiff. They seat well in the groove and seal tight. Much better than the old, flattened ones I replaced.

Mia C. ★★★★★

The cross-section on these o-rings is exactly 0.139" as stated, making them a perfect fit for my hydraulic repair job. They handled the -40°F cold test in the garage without getting brittle.

Christopher E. ★★★★★

Finally found o-rings that actually seal my airline quick-connects without leaking. The 70 durometer feels just right, not too stiff.