Mutual Screw & Supply

0.139" CS X 4.484" ID HNBR O-Rings | AS568-246 | Dash 246 | 80 Durometer (14 / Pkg.)

0.139" CS X 4.484" ID HNBR O-Rings | AS568-246 | Dash 246 | 80 Durometer (14 / - Main image
$34.28 $56.19 In stock

HNBR o-rings in AS568-246, 4.484" inner diameter by 0.139" 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: 246
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 4.484" (113.89 mm)
  • Durometer: 80 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 14 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)

Adam ★★★★★

Needed a replacement for a high-temp seal on a steam valve, and these HNBR rings handled the 280°F service without any softening. The 80 durometer feels just right—firm enough to hold pressure but not brittle. Exact fit on the 4.484" groove, no issues at all.

Sebastian ★★★★★

Installed these on a hydraulic cylinder that sees continuous 250°F service, and the 80 durometer HNBR is holding up perfectly with no leaks after two weeks. The 4.484" ID fit exactly as needed on the groove.

Emma L. ★★★★★

The temperature range was the main reason I picked these, and so far they’ve held up fine in a hot oil application that’s been running near 280°F. The 80 durometer hardness gives them a solid, firm feel when installing, and the fit on the 4.484" bore was snug without any wrestling.