Mutual Screw & Supply

0.139" CS X 4.734" ID HNBR O-Rings | AS568-248 | Dash 248 | 80 Durometer (14 / Pkg.)

0.139" CS X 4.734" ID HNBR O-Rings | AS568-248 | Dash 248 | 80 Durometer (14 / - Main image
$43.62 $58.16 In stock

HNBR o-rings in AS568-248, 4.734" 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: 248
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 4.734" (120.24 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 (4.4 / 5 · 5 reviews)

William ★★★★★

Needed a replacement for a hydraulic seal that kept failing at high temps, installed this HNBR ring and it's been running smooth even with oil temps around 250°F. The 0.139" cross-section is noticeably more robust than the old o-ring.

Timothy ★★★★★

The 4.734" inner diameter fits my pump housing perfectly, and the 80 durometer gives a tight seal without being impossible to install. I've used these in hydraulic fluid up to about 250°F with no issues at all.

Elizabeth ★★★★★

Installed a set on a high-temp pneumatic valve that kept failing with standard Buna-N rings. The HNBR material handles the heat much better and has held up through several hot cycles now without any leaks.