Mutual Screw & Supply

0.21" CS X 3.1" ID HNBR O-Rings | AS568-338 | Dash 338 | 80 Durometer (12 / Pkg.)

0.21" CS X 3.1" ID HNBR O-Rings | AS568-338 | Dash 338 | 80 Durometer (12 / - Main image
$37.07 $57.92 In stock

HNBR o-rings in AS568-338, 3.1" 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: 338
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 3.1" (78.74 mm)
  • Durometer: 80 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 12 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)

Mia V. ★★★★★

I needed something that could handle higher heat near a compressor manifold, and these HNBR rings fit the bill perfectly. The 80 durometer feels nice and firm yet seals snugly, and the pack of twelve is just right for my project.

Mia ★★★★★

I had to replace a worn-out gasket on a hydraulic cylinder, and the 0.21" cross-section fit perfectly—no leaks so far. The 80 durometer feels nice and firm, exactly what I needed for that high-pressure seal.

Ruby N. ★★★★★

The temperature range is what sold me—these handle the hot hydraulic lines in my shop without softening, and the 80 durometer feels plenty firm when seated. They’re a solid match for the 3.1-inch bore I needed, and the pack of twelve means I’ve got spares on hand for the next job.