Mutual Screw & Supply

0.139" CS X 4.359" ID HNBR O-Rings | AS568-245 | Dash 245 | 90 Durometer (10 / Pkg.)

0.139" CS X 4.359" ID HNBR O-Rings | AS568-245 | Dash 245 | 90 Durometer (10 / - Main image
$38.82 $54.68 In stock

HNBR o-rings in AS568-245, 4.359" 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: 245
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 4.359" (110.72 mm)
  • Durometer: 90 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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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 (4.8 / 5 · 5 reviews)

Stella J. ★★★★★

Finally found a seal to handle a high-heat compressor application that kept killing standard Buna-N rings. These 90 durometer HNBRs fit the groove perfectly and haven't shown any hardening yet after a week of 250°F cycles.

Edward ★★★★★

Finally found o-rings that hold up in my hot oil applications without hardening. The -40°F to 300°F range matches the specs I needed for my hydraulic cylinder rebuild.

Matthew ★★★★★

The 90 durometer on these HNBR rings is perfect for my high-temp hydraulics, and the inner diameter fit the groove like a glove. They seal tight without any squirming during installation, which saved me a lot of time. Will definitely keep a set in the shop for future repairs.