Mutual Screw & Supply

0.21" CS X 3.35" ID HNBR O-Rings | AS568-340 | Dash 340 | 80 Durometer (10 / Pkg.)

0.21" CS X 3.35" ID HNBR O-Rings | AS568-340 | Dash 340 | 80 Durometer (10 / - Main image
$31.67 $51.08 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: 80 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 10 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 (4.4 / 5 · 5 reviews)

Emma ★★★★★

The 80 durometer hardness is just right for my high-temp application, holding its shape without feeling brittle. I’ve had these in service for two weeks now and they’ve handled the 300°F range without a hiccup.

Ellie ★★★★★

Finally got around to swapping out the old o-rings on my hydraulic ram and the 0.21" cross-section on these was exactly right for a snug, leak-free fit. They feel more durable than standard nitrile and the -40°F rating gives me peace of mind for winter use.

Sophia M. ★★★★★

These HNBR o-rings sealed my valve perfectly, handling 300°F steam without any issue. The 80 durometer definitely feels more durable than standard nitrile.