Mutual Screw & Supply

0.21" CS X 5.475" ID Viton FKM O-Rings | AS568-353 | Dash 353 | 75 Durometer | Brown (8 / Pkg.)

0.21" CS X 5.475" ID Viton FKM O-Rings | AS568-353 | Dash 353 | 75 Durometer | - Main image
$34.36 $56.33 In stock

Viton FKM o-rings in AS568-353, 5.475" 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: 353
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 5.475" (139.06 mm)
  • Durometer: 75 Shore A
  • Color: Brown
  • 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)

Ellie C. ★★★★★

I needed a high-temp seal for a steam line, and these viton FKM rings handled the 350°F cycling without any issue. The 75 durometer material feels firm but still seated nicely in the groove. Exactly what the spec called for.

Lily ★★★★★

These Viton o-rings handled the high-heat seal on my compressor's discharge line without any issues, and the 75 durometer felt just right for the application. Given the 400°F rating, I'm confident they'll hold up under the extreme conditions.

Adam ★★★★★

The 0.21" cross-section fit perfectly into the groove on my hydraulic pump, and the 75 durometer feels firm but not brittle. I've had trouble with standard Buna-N o-rings failing under continuous heat near 200°F, but these Viton ones haven't hardened or cracked after a month of daily use. They seale