Mutual Screw & Supply

0.21" CS X 1.287" ID Buna-N Nitrile O-Rings | AS568-323 | Dash 323 | 70 Durometer | Black (200 / Pkg.)

0.21" CS X 1.287" ID Buna-N Nitrile O-Rings | AS568-323 | Dash 323 | 70 - Main image
$35.39 $52.05 In stock

Buna-N Nitrile o-rings in AS568-323, 1.287" 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: 323
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 1.287" (32.69 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 (4.4 / 5 · 5 reviews)

Thomas ★★★★★

The 70 durometer feels just right for my hydraulic fittings — not too soft, not too hard. These 323s seated perfectly on the first try with no leaks. Exactly what I needed for a quick repair job.

Emily W. ★★★★★

I’ve been using these o-rings for a small hydraulic repair, and the 0.21" cross-section fit the groove perfectly. They feel sturdy and the -40°F to 250°F range covers what I need. Definitely a solid batch.

Amelia ★★★★★

The cross-section on these o-rings is exactly 0.21" as listed, and they seated perfectly in a hydraulic fitting I repaired. I’ve used them from a cold garage to a hot engine bay without any issues.