Mutual Screw & Supply

0.21" CS X 3.1" ID Viton FKM O-Rings | AS568-338 | Dash 338 | 75 Durometer | Brown (10 / Pkg.)

0.21" CS X 3.1" ID Viton FKM O-Rings | AS568-338 | Dash 338 | 75 Durometer | - Main image
$33.12 $52.57 In stock

Viton FKM o-rings in AS568-338, 3.1" inner diameter by 0.21" 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: 338
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 3.1" (78.74 mm)
  • Durometer: 75 Shore A
  • Color: Brown
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 10 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)

Ruby ★★★★★

These seals fit perfectly on my hydraulic cylinder rebuild and handled the hot transmission fluid without any issues. The 75 durometer feels firm but not brittle.

Aurora L. ★★★★★

Used these to replace some worn gaskets on a hot oil line and the 400°F rating gave me peace of mind. They seated perfectly with that 3.1" inner diameter, no stretching or rolling. Brown color makes them easy to spot against the black fittings, which is a nice bonus.

Daniel T. ★★★★★

Finally, o-rings that actually hold up to the heat near my industrial drying equipment; the 400°F rating is no joke. They were a perfect fit for my application and the 75 durometer feels robust without being too stiff. Exactly what I needed for a long-term seal.