Mutual Screw & Supply

0.139" CS X 2.609" ID HNBR O-Rings | AS568-231 | Dash 231 | 90 Durometer (20 / Pkg.)

0.139" CS X 2.609" ID HNBR O-Rings | AS568-231 | Dash 231 | 90 Durometer (20 / - Main image
$37.64 $59.75 In stock

HNBR o-rings in AS568-231, 2.609" 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: 231
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 2.609" (66.27 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 20 per package
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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

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 (5.0 / 5 · 5 reviews)

Steven ★★★★★

I replaced the o-rings in a hot water circulation pump with these HNBR seals, and they fit perfectly with the 2.609" inner diameter. The 90 durometer feels noticeably firmer than the old ones, which should handle the 300°F max temp without issues.

Ava T. ★★★★★

Used these to reseal a pneumatic actuator at work, and the 90 durometer HNBR held up perfectly under high heat cycles. Fit was spot-on for the groove depth, no leaks at all so far.

Benjamin ★★★★★

I ordered these for a hydraulic cylinder rebuild, and the 0.139" cross-section fit perfectly into the groove. They slid in easily and sealed well on the first try, handling the 90-degree heat in my shop just fine.