Mutual Screw & Supply

0.21" CS X 4.475" ID Buna-N Nitrile O-Rings | AS568-349 | Dash 349 | 70 Durometer | Black (50 / Pkg.)

0.21" CS X 4.475" ID Buna-N Nitrile O-Rings | AS568-349 | Dash 349 | 70 - Main image
$37.5 $52.82 In stock

Buna-N Nitrile o-rings in AS568-349, 4.475" 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: 349
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 4.475" (113.66 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 (5.0 / 5 · 5 reviews)

James ★★★★★

Installed these on a hydraulic cylinder repair and the 70 durometer held up great under 1500 psi. Fit snugly in the groove with no twisting during assembly, and they sealed on the first try.

Sofia N. ★★★★★

The 0.21" cross-section seated perfectly in my pneumatic valve groove with no leaks. I've been running them at around 180°F for two weeks now and they're holding up well.

Benjamin R. ★★★★★

Put these on my hydraulic cylinder and they sealed perfectly the first time. The 70 durometer feels just right for a static application like this.