Mutual Screw & Supply

0.139" CS X 0.859" ID Viton FKM O-Rings | AS568-212 | Dash 212 | X-Ring | 70 Durometer (50 / Pkg.)

0.139" CS X 0.859" ID Viton FKM O-Rings | AS568-212 | Dash 212 | X-Ring | 70 - Main image
$37.2 $60.98 In stock

Viton FKM o-rings in AS568-212, 0.859" 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 (X-Ring)
  • Material: Viton FKM
  • AS568 dash size: 212
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.859" (21.82 mm)
  • Durometer: 70 Shore A
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 50 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 (4.4 / 5 · 5 reviews)

Penelope ★★★★★

Had to replace some seals in a steam valve that sees 350°F cycles, and these Viton FKM o-rings haven't leaked a drop since installation. The -15°F to 400°F rating gives me confidence for future cold startups too.

Owen ★★★★★

The 70 durometer feels just right for a snug seal without being impossible to install. I used these on a hot oil line and they haven't softened or deformed after weeks at 350°F, which was my main worry.

Aurora F. ★★★★★

Finally found o-rings that actually hold up in my high-temp equipment; after swapping to these Viton FKM 212s, I’ve had zero leaks where Buna-N ones failed within weeks. The 70 durometer feels just right for a snug, tight seal, and they snap into place without struggling.