Mutual Screw & Supply

0.139" CS X 3.484" ID Buna-N Nitrile O-Rings | AS568-238 | Dash 238 | 70 Durometer | Black (200 / Pkg.)

0.139" CS X 3.484" ID Buna-N Nitrile O-Rings | AS568-238 | Dash 238 | 70 - Main image
$43 $58.9 In stock

Buna-N Nitrile o-rings in AS568-238, 3.484" 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: 238
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.484" (88.49 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 200 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)

Aurora A. ★★★★★

Finally found the right size to replace the worn seals on my hydraulic cylinder; the 3.484" ID fits perfectly and the material feels quality. I've bought cheaper o-rings before, but these actually seal without any leaks.

Joshua ★★★★★

The 70 durometer is exactly the firmness I needed for these seals, and the 3.484" inner diameter fit perfectly in the groove. I bought the 200-pack to last through multiple rebuilds, and every ring has been uniform without any flash or imperfections.

Scarlett X. ★★★★★

I needed a large batch of these for a pneumatic rebuild project, and the 0.139" cross-section seals perfectly in the groove. The -40°F to +250°F range gives me confidence they'll hold up in any weather.