Mutual Screw & Supply

0.21" CS X 5.475" ID HNBR O-Rings | AS568-353 | Dash 353 | 80 Durometer (7 / Pkg.)

0.21" CS X 5.475" ID HNBR O-Rings | AS568-353 | Dash 353 | 80 Durometer (7 / - Main image
$38.15 $56.94 In stock

HNBR o-rings in AS568-353, 5.475" inner diameter by 0.21" cross-section. Service range -40°F to +300°F (-40°C to +149°C). Also known as HSN, Highly Saturated Nitrile.

Specifications

  • Product type: O-Ring
  • Material: HNBR
  • AS568 dash size: 353
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 5.475" (139.06 mm)
  • Durometer: 80 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 7 per package
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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)

Emily D. ★★★★★

I needed a replacement for a high-temp compressor gasket and these HNBR rings handled the 250°F operating temperature without any issues. The 0.21" cross-section feels substantial and the 80 durometer gives them a nice firm seal.

Stella J. ★★★★★

These fit perfectly on a pump seal I rebuilt, and the HNBR material handles the heat better than the Buna-N ones I used before. They slid right on without needing to stretch too much.

Joshua ★★★★★

Put these on a hydraulic cylinder that sees some pretty high heat cycles, and they've held up perfectly so far—no leaks at all. The 80 durometer feels nice and firm without being too stiff to seat properly. Exactly what I needed for that -40°F rating in our cold storage setup.