Mutual Screw & Supply

0.21" CS X 2.225" ID Viton FKM O-Rings | AS568-331 | Dash 331 | X-Ring | 70 Durometer (8 / Pkg.)

0.21" CS X 2.225" ID Viton FKM O-Rings | AS568-331 | Dash 331 | X-Ring | 70 - Main image
$34.41 $56.41 In stock

Viton FKM o-rings in AS568-331, 2.225" 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 (X-Ring)
  • Material: Viton FKM
  • AS568 dash size: 331
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 2.225" (56.52 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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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)

Richard H. ★★★★★

The X-ring profile seated perfectly in my gland without any twisting, and the 0.21" cross-section feels beefy enough for high-pressure service. I've had these on a hot oil line running at 300°F for three weeks now, and they're holding up way better than the cheap Buna ones I used before.

Samuel W. ★★★★★

The 70 durometer rating on these FKM o-rings gave me the confidence they'd hold up under high heat, and so far they haven't softened or deformed at all. I used them on a steam valve that cycles above 300°F, and the seal is still perfect after a month.

Lily E. ★★★★★

Installed these on a hydraulic fitting that sees constant 300°F heat; the Viton FKM material hasn't softened or cracked after a week of use, and the 70 durometer feels noticeably more robust than standard Buna-N seals.