Mutual Screw & Supply

0.21" CS X 3.35" ID HNBR O-Rings | AS568-340 | Dash 340 | 90 Durometer (8 / Pkg.)

0.21" CS X 3.35" ID HNBR O-Rings | AS568-340 | Dash 340 | 90 Durometer (8 / - Main image
$44.04 $58.72 In stock

HNBR o-rings in AS568-340, 3.35" 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: 340
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 3.35" (85.09 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 8 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 (4.6 / 5 · 5 reviews)

Alexander D. ★★★★★

I was worried about finding a seal for a hot oil application, but the 3.35" inner diameter fits perfectly and the 90 durometer HNBR feels much more durable than the standard Buna I've used before. It's held up to 250°F without any issues so far.

Eli ★★★★★

These 90-durometer HNBR rings handled the high heat near my compressor's discharge port with no softening at all. The 3.35-inch inner diameter was a perfect fit for the groove, and the package of eight was just right for this job.

Brian ★★★★★

Sealed the hydraulic port on my press without any issue, and the 90 durometer feels noticeably sturdier than standard o-rings. Very happy with the fit.