Mutual Screw & Supply

0.21" CS X 5.225" ID HNBR O-Rings | AS568-352 | Dash 352 | 90 Durometer (5 / Pkg.)

0.21" CS X 5.225" ID HNBR O-Rings | AS568-352 | Dash 352 | 90 Durometer (5 / - Main image
$33.38 $55.64 In stock

HNBR o-rings in AS568-352, 5.225" 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: 352
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 5.225" (132.71 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 5 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 (4.8 / 5 · 5 reviews)

Daniel R. ★★★★★

I was worried about the heat tolerance for my hydraulic system, but these held up perfectly above 250°F. The 0.21" cross-section seated snugly with no leaks.

George ★★★★★

The 90-durometer hardness made installation a breeze—no squishing or rolling out of the groove like softer rings I’ve used. These handled a 250°F steam line test without a hint of deformation, and the -40°F spec gives me confidence for winter startups.

Hannah X. ★★★★★

Was replacing old seals on a press and these HNBR rings fit the groove perfectly. The 90 durometer feels really sturdy, and they've held up well under constant heat.