Mutual Screw & Supply

0.139" CS X 6.359" ID HNBR O-Rings | AS568-261 | Dash 261 | 90 Durometer (6 / Pkg.)

0.139" CS X 6.359" ID HNBR O-Rings | AS568-261 | Dash 261 | 90 Durometer (6 / - Main image
$37.4 $54.21 In stock

HNBR o-rings in AS568-261, 6.359" 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: 261
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 6.359" (161.52 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 6 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 (5.0 / 5 · 5 reviews)

Isabella L. ★★★★★

I’ve been using these for high-temp oil seals on a compressor, and the 90 durometer holds up perfectly at 300°F without softening. The HNBR material gives me way more confidence than standard nitrile for this application.

Aurora ★★★★★

I needed a tough seal for a hydraulic repair and the 90 durometer on these HNBR rings handled the pressure without deforming. They slid into the groove cleanly and the temperature range covers everything I work with.

Edward ★★★★★

These o-rings were a perfect fit for a high-temp hydraulic application I've been fighting with. The 90 durometer HNBR is stiff enough to hold pressure at 275°F without any noticeable deformation after a week of service.