Mutual Screw & Supply

0.139" CS X 0.421" ID Viton FKM O-Rings | AS568-205 | Dash 205 | 75 Durometer | Brown (200 / Pkg.)

0.139" CS X 0.421" ID Viton FKM O-Rings | AS568-205 | Dash 205 | 75 Durometer | - Main image
$36.44 $60.73 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: Brown
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 200 per package
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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)

Jacob D. ★★★★★

The heat tolerance is real—I've had these in service at 350°F for weeks and they haven't hardened or cracked. The 0.421" inner diameter seated perfectly in my groove without any stretching issues. For a 200-pack at this price, the quality is honestly better than I expected.

Madison ★★★★★

Finally, a Viton FKM O-ring that actually withstands the heat in my compressor setup without degrading. The 0.139" cross-section feels robust and the package of 200 gives plenty of spares. Exactly what I needed for a reliable seal in a high-temp application.

Edward ★★★★☆

The 75 durometer hardness gives these a nice firm feel when seating them in the groove. They fit my standard 0.421" ID application perfectly, though the package of 200 is more than I'll ever need.