Mutual Screw & Supply

0.21" CS X 3.725" ID Viton FKM O-Rings | AS568-343 | Dash 343 | 75 Durometer | Black (10 / Pkg.)

0.21" CS X 3.725" ID Viton FKM O-Rings | AS568-343 | Dash 343 | 75 Durometer | - Main image
$37.99 $55.06 In stock

Viton FKM o-rings in AS568-343, 3.725" 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: 343
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 3.725" (94.61 mm)
  • Durometer: 75 Shore A
  • Color: Black
  • 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: Handling (business days) 0–1; Transit (business days) 7–15.

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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 (4.2 / 5 · 5 reviews)

Edward J. ★★★★★

Replaced the old cracked seals on a high-heat pneumatic line and these Viton rings slipped right in, no wrestling needed. The 75 durometer feels firm yet forgiving under compression, and the -15°F to +400°F range gives me peace of mind for seasonal swings. Solid buy for the price.

Thomas ★★★★★

I was worried these wouldn't seal properly in my hot oil application, but the Viton material handles the high temperature perfectly. The 75 durometer is firm enough to hold pressure without being a pain to install.

Jacob ★★★★☆

Working on a stubborn hydraulic fitting that needed exact size replacement, these o-rings fit perfectly. The 75 durometer feels sturdy, and the Viton material seems a solid upgrade for high-heat applications. Only complaint is the package is slightly small for the price.