Mutual Screw & Supply

0.139" CS X 11.984" ID Buna-N Nitrile O-Rings | AS568-284 | Dash 284 | 70 Durometer | Black (14 / Pkg.)

0.139" CS X 11.984" ID Buna-N Nitrile O-Rings | AS568-284 | Dash 284 | 70 - Main image
$37.36 $54.14 In stock

Buna-N Nitrile o-rings in AS568-284, 11.984" 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: 284
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 11.984" (304.39 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 14 per package
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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 (4.8 / 5 · 5 reviews)

Grace W. ★★★★★

The 0.139" cross-section fits snugly into the groove on my hydraulic cylinder, and the 70 durometer feels just right—not too stiff. I've had zero leaks since swapping these in a week ago, which is a relief after fighting with worn-out seals. For the price and quantity, these are a solid deal for sta

Daniel Y. ★★★★★

Installed these on our irrigation pump flanges and they seated perfectly with no leaks. The 70 durometer feels just right for a snug seal without being too stiff.

Alexander ★★★★★

The cross-section is exactly 0.139" as listed, and the rubber feels pliable yet firm enough to seal a water pump flange. I've used these for a few days now with no leaks or issues, even at higher temperatures.