Mutual Screw & Supply

0.21" CS X 5.475" ID Buna-N Nitrile O-Rings | AS568-353 | Dash 353 | 70 Durometer | Black (50 / Pkg.)

0.21" CS X 5.475" ID Buna-N Nitrile O-Rings | AS568-353 | Dash 353 | 70 - Main image
$33.87 $55.52 In stock

Buna-N Nitrile o-rings in AS568-353, 5.475" 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: 353
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 5.475" (139.06 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 50 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 (4.0 / 5 · 5 reviews)

Madison Y. ★★★★★

The 0.21" cross-section makes these o-rings a perfect fit for my compressor rebuild, and the 70 durometer feel sturdier than the old ones I pulled off. Sealed the housing on the first try with no leaks, even after a solid afternoon running at 200°F.

Brian I. ★★★★★

The ID measured perfectly at 5.475", and the 70 durometer feels firm but not brittle—I've had cheaper o-rings crack at room temp, but these held up fine. Fifty in the pack is plenty for my hydraulic repair job.

Lily ★★★★☆

I needed a replacement for a hydraulic system seal, and these dash 353 o-rings were a perfect fit for the groove depth. The rubber feels slightly stiffer than I expected at 70 durometer, but they seated well and should handle the -40 to 250°F range fine. Just wish the package had maybe one or two ex