Mutual Screw & Supply

0.21" CS X 4.475" ID Viton FKM O-Rings | AS568-349 | Dash 349 | 90 Durometer (14 / Pkg.)

0.21" CS X 4.475" ID Viton FKM O-Rings | AS568-349 | Dash 349 | 90 Durometer - Main image
$40.44 $56.17 In stock

Viton FKM o-rings in AS568-349, 4.475" 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: 349
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 4.475" (113.66 mm)
  • Durometer: 90 Shore A
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 14 per package
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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)

Henry ★★★★★

Needed to replace a worn seal in a hydraulic setup that sees some serious heat, and these Viton rings handled the 300°F service without any softening. The 90 durometer hardness made them feel stout during installation, and the 14-pack gives plenty of spares for the price.

Zoe O. ★★★★★

The cross-section on these is noticeably thicker than the standard o-rings I've used before, so they feel much more durable when seated in the groove. I put them on a hydraulic fitting that sees constant heat, and they sealed perfectly on the first try. Exactly what I needed for a high-temp applicat

Evelyn ★★★★★

That 400°F rating is the main reason I bought these—my pneumatic valve gets hot enough to melt standard Buna-N rings in a week. After swapping to this Viton set, no leaks so far. The 90-durometer feel is noticeably stiffer than what I used before, which is exactly what the application needed.