Mutual Screw & Supply

0.21" CS X 2.225" ID Buna-N Nitrile O-Rings | AS568-331 | Dash 331 | 90 Durometer (125 / Pkg.)

0.21" CS X 2.225" ID Buna-N Nitrile O-Rings | AS568-331 | Dash 331 | 90 - Main image
$37.68 $54.61 In stock

Buna-N Nitrile o-rings in AS568-331, 2.225" inner diameter by 0.21" 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: 331
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 2.225" (56.52 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 125 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)

Ava D. ★★★★★

Installed these on some hydraulic fittings that kept leaking with cheaper seals. The 90 durometer hardness really holds its shape under pressure, and the 250°F rating gives me confidence in hot oil applications.

Madison ★★★★★

Finally, an o-ring that doesn't deform under the constant pressure of my hydraulic setup—these 90 durometer rings hold their shape perfectly. The -40°F to +250°F range covers everything I need.

Ellie G. ★★★★★

The 90 durometer is perfect for the high-pressure seal I needed on a pneumatic cylinder. These 331 o-rings slid right into place and haven't leaked a drop after a week of testing.