Mutual Screw & Supply

0.139" CS X 0.421" ID Viton FKM O-Rings | AS568-205 | Dash 205 | 75 Durometer | Black (250 / Pkg.)

0.139" CS X 0.421" ID Viton FKM O-Rings | AS568-205 | Dash 205 | 75 Durometer | - Main image
$38 $58.46 In stock

Viton FKM o-rings in AS568-205, 0.421" inner diameter by 0.139" 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: 205
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.421" (10.69 mm)
  • Durometer: 75 Shore A
  • Color: Black
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 250 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 (4.6 / 5 · 5 reviews)

Sofia ★★★★★

I’ve been using these o-rings in a hot oil application, and so far they’ve held up great at 350°F without any hardening. The 75 durometer feels just right for sealing, and the 250-pack gives plenty of spares for future jobs. Exactly what I needed for high-temp work.

Ella ★★★★★

These seals fit perfectly into my high-temp air fitting thanks to the precise 0.421" inner diameter. I’ve tested them up to 375°F and they held firm with no softening. Exactly what I needed for a reliable seal.

Sebastian ★★★★★

I needed o-rings that would hold up in a high-heat application, and these Viton FKM ones are rated up to 400°F. The 75 durometer feels firm but still seals nicely, and the pack of 250 is more than enough for my project.