Mutual Screw & Supply

0.139" CS X 4.859" ID Viton FKM O-Rings | AS568-249 | Dash 249 | 75 Durometer | Black (16 / Pkg.)

0.139" CS X 4.859" ID Viton FKM O-Rings | AS568-249 | Dash 249 | 75 Durometer | - Main image
$32.86 $53.87 In stock

Viton FKM o-rings in AS568-249, 4.859" 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: 249
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 4.859" (123.42 mm)
  • Durometer: 75 Shore A
  • Color: Black
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 16 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)

Zoe ★★★★★

The 0.139" cross-section on these is noticeably thicker than standard o-rings, which gave me a much better seal on a hydraulic line that’s been a pain. I’ve been running them near 350°F for a couple weeks now with zero leaks.

Ellie ★★★★★

Needed a replacement for a leaky fitting on a high-temp line, and these Viton rings handled the job without a hitch. The 4.859" inner diameter seated snugly, and the 75 durometer feels firm but not brittle during installation. Trusting the -15°F to +400°F range for my steam setup, so far so good.

Lily ★★★★★

Fit perfectly on my hydraulic cylinder, and the 75 durometer gives them just the right firmness without being too stiff. I've had them on for a week now with no leaks.