Mutual Screw & Supply

0.21" CS X 2.225" ID Buna-N Nitrile O-Rings | AS568-331 | Dash 331 | 70 Durometer | Black (200 / Pkg.)

0.21" CS X 2.225" ID Buna-N Nitrile O-Rings | AS568-331 | Dash 331 | 70 - Main image
$40.91 $65.99 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: 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 (4.8 / 5 · 5 reviews)

Lily M. ★★★★★

Those 200 rings came in a neat package and the 70 durometer hardness feels just right for my hydraulic fittings. I’ve used them on a line that sees around 200°F and they’ve held up without any distortion.

Brian X. ★★★★★

The 0.21" cross-section fits perfectly in my pneumatic cylinder rebuild, and the 70-durometer Buna-N handles the hydraulic oil with no swelling. I’ve installed a dozen so far and every seal holds tight after 30 minutes of use.

Zoe W. ★★★★★

Exactly what I needed to rebuild a hydraulic cylinder on my log splitter. The 70-durometer Buna-N material feels perfect for the heat and oil exposure, and having 200 in the pack is great for future repairs.