Mutual Screw & Supply

0.139" CS X 3.359" ID Viton FKM O-Rings | AS568-237 | Dash 237 | X-Ring | 70 Durometer (10 / Pkg.)

0.139" CS X 3.359" ID Viton FKM O-Rings | AS568-237 | Dash 237 | X-Ring | 70 - Main image
$44.21 $61.4 In stock

Viton FKM o-rings in AS568-237, 3.359" 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: 237
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.359" (85.32 mm)
  • Durometer: 70 Shore A
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 10 per package
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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 (4.4 / 5 · 5 reviews)

Daniel T. ★★★★★

Needed a high-temp seal for a steam valve and these Viton rings handled the 350°F service without any issue. The 70 durometer feels firm but not brittle after installation, and the fit on the 3.359" diameter groove was spot-on.

Owen ★★★★★

These replaced a worn seal in a hot water valve and the 400°F rating gave me peace of mind. The 70 durometer feels firm but not brittle, and the fit on the 3.359" groove was spot on.

Victoria ★★★★★

I’ve been trying to find o-rings that can handle high-temp sealing without degrading, and these Viton FKM ones are working flawlessly on my heat exchanger. The 70 durometer feels just right—stiff enough to hold pressure, not brittle.