Mutual Screw & Supply

0.139" CS X 5.484" ID HNBR O-Rings | AS568-254 | Dash 254 | 80 Durometer (12 / Pkg.)

0.139" CS X 5.484" ID HNBR O-Rings | AS568-254 | Dash 254 | 80 Durometer (12 / - Main image
$40.08 $54.91 In stock

HNBR o-rings in AS568-254, 5.484" 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: 254
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.484" (139.29 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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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Riley Z. ★★★★★

I was a bit skeptical about the high-temperature rating, but these HNBR o-rings held up perfectly in my hot oil system. The 0.139" cross-section seated easily in the groove without any twisting.

Robert V. ★★★★★

Popped one of these into a high-temp pneumatic actuator on Friday and it’s holding pressure perfectly after a week of cycling at 250°F. The 80 durometer feels noticeably firmer than the standard Buna-Ns I’ve been using, which is exactly what I needed for this application.

Chloe ★★★★★

Finally found HNBR o-rings that fit my high-temp valve application, and these AS568-254s seat perfectly. The 80 durometer feels solid, and they handled the 250°F steam without any swelling.