Mutual Screw & Supply

0.21" CS X 4.35" ID HNBR O-Rings | AS568-348 | Dash 348 | 80 Durometer (7 / Pkg.)

0.21" CS X 4.35" ID HNBR O-Rings | AS568-348 | Dash 348 | 80 Durometer (7 / - Main image
$38.84 $52.49 In stock

HNBR o-rings in AS568-348, 4.35" 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: 348
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 4.35" (110.49 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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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)

Benjamin ★★★★★

The 0.21" cross-section fit perfectly into a high-heat pneumatic valve I was rebuilding. These HNBR rings held up well when the system hit 280°F, no softening at all. Great value for a seven-pack at this size.

Steven ★★★★★

Installed these in a hydraulic cylinder that sees constant heat cycling, and the 80 durometer HNBR holds up perfectly under pressure. The -40°F rating gives me peace of mind for winter ops too.

Nicholas N. ★★★★★

The dash 348 sizing is spot-on for the groove depth, and the 80 durometer feels firm enough for a high-pressure seal. I've had HNBR fail before in hot oil, so that -40°F to +300°F range is exactly why I grabbed these.