Mutual Screw & Supply

0.139" CS X 2.609" ID Buna-N Nitrile O-Rings | AS568-231 | Dash 231 | 90 Durometer (200 / Pkg.)

0.139" CS X 2.609" ID Buna-N Nitrile O-Rings | AS568-231 | Dash 231 | 90 - Main image
$37.81 $55.61 In stock

Buna-N Nitrile o-rings in AS568-231, 2.609" 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: 231
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 2.609" (66.27 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 200 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 (4.6 / 5 · 5 reviews)

Thomas Z. ★★★★★

These 90-durometer o-rings fit my pneumatic cylinder perfectly and the firmness is just right for the higher operating pressure. The pack of 200 is more than I’ll need for a while, which is great for the price.

Zoe E. ★★★★★

I needed a 2.609" ID o-ring for a hydraulic valve rebuild, and these 90 durometer Buna-N seals fit perfectly and didn't deform under pressure. The -40°F to +250°F range gives me confidence they'll handle temperature swings without cracking.

Adam O. ★★★★★

These fit perfectly on my hydraulic cylinder rod ends where a standard 70 durometer would squeeze out. The 90 durometer holds its shape under the pressure and the package of 200 will last me a good while.