Mutual Screw & Supply

0.139" CS X 10.984" ID Buna-N Nitrile O-Rings | AS568-280 | Dash 280 | 70 Durometer | Black (20 / Pkg.)

0.139" CS X 10.984" ID Buna-N Nitrile O-Rings | AS568-280 | Dash 280 | 70 - Main image
$30.64 $51.06 In stock

Buna-N Nitrile o-rings in AS568-280, 10.984" 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: 280
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 10.984" (278.99 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 20 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 (4.6 / 5 · 5 reviews)

Alexander X. ★★★★★

Needed these for a hydraulic cylinder rebuild on an old press, and the 70 durometer feels just right for the application. They seated perfectly in the grooves without any binding, exactly as specified.

Leo B. ★★★★★

The 10.984" inner diameter was spot-on for my hydraulic cylinder rebuild, and the 70 durometer stiffness feels exactly right for a tight seal. Used them to replace some cracked rings and no leaks after a week of hard use.

Nicholas H. ★★★★★

The rubber feels noticeably denser and more durable than the cheap o-rings I’ve used before, with no visible flash or rough edges. Handled the hot water test at 180°F just fine, and the 70 durometer seems spot on for a snug, leak-free seal.