Mutual Screw & Supply

0.139" CS X 3.734" ID Viton FKM O-Rings | AS568-240 | Dash 240 | 75 Durometer | Black (13 / Pkg.)

0.139" CS X 3.734" ID Viton FKM O-Rings | AS568-240 | Dash 240 | 75 Durometer | - Main image
$34.54 $53.14 In stock

Viton FKM o-rings in AS568-240, 3.734" inner diameter by 0.139" cross-section. Service range -15°F to +400°F (-26°C to +204°C). Also known as FKM, Fluoroelastomer.

Specifications

  • Product type: O-Ring
  • Material: Viton FKM
  • AS568 dash size: 240
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.734" (94.84 mm)
  • Durometer: 75 Shore A
  • Color: Black
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 13 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 (5.0 / 5 · 5 reviews)

Robert C. ★★★★★

Finally found replacement o-rings for a high-temp flange that kept failing at 300°F, and these Viton ones have held up perfectly for a month now. The 3.734" inner diameter fit snug without any wrestling, and the 75 durometer feels firm but still flexible. Just ordered two more packs for spares.

Eva Y. ★★★★★

Installed these on a hydraulic fitting that sees 350°F, and the Viton material held up perfectly with no softening or leaks. The 0.139" cross-section gives a nice solid feel when seated, too.

Lucy G. ★★★★★

Finally, an o-ring that actually seals my hydraulic manifold without leaking under pressure. The 75 durometer feels exactly right—stiff enough to hold shape, but it seated into the groove without fighting me. Priced per package, so I ordered two sets and swapped out all the worn ones in one go.