Mutual Screw & Supply

0.139" CS X 3.609" ID Viton FKM O-Rings | AS568-239 | Dash 239 | X-Ring | 70 Durometer (8 / Pkg.)

0.139" CS X 3.609" ID Viton FKM O-Rings | AS568-239 | Dash 239 | X-Ring | 70 - Main image
$34.14 $50.95 In stock

Viton FKM o-rings in AS568-239, 3.609" 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 (X-Ring)
  • Material: Viton FKM
  • AS568 dash size: 239
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.609" (91.67 mm)
  • Durometer: 70 Shore A
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 8 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 (4.8 / 5 · 5 reviews)

Charlotte T. ★★★★★

Installed these in a hot water valve that kept leaking with standard rubber rings — the Viton held up perfectly at 200°F with no softening. Measured them and the 3.609" ID was dead on.

Leo N. ★★★★★

I needed o-rings that could handle high heat near a furnace, and these Viton ones are holding up perfectly at over 350°F. The 3.609" ID fit snugly into the groove without any stretching issues.

Lucy M. ★★★★★

Worked perfectly for sealing a high-temp manifold on my hydraulic press; the 70 durometer hardness gave just the right squeeze without being too stiff. So far holding up well under constant 300°F heat cycles with no swelling or leaks.