Mutual Screw & Supply

0.139" CS X 0.484" ID PTFE O-Rings | AS568-206 | Dash 206 | 20 Durometer (50 / Pkg.)

0.139" CS X 0.484" ID PTFE O-Rings | AS568-206 | Dash 206 | 20 Durometer (50 / - Main image
$38.7 $53.01 In stock

PTFE o-rings in AS568-206, 0.484" inner diameter by 0.139" cross-section. Service range -350°F to +500°F (-212°C to +260°C). Also known as Teflon, Polytetrafluoroethylene.

Specifications

  • Product type: O-Ring
  • Material: PTFE
  • AS568 dash size: 206
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.484" (12.29 mm)
  • Durometer: 20 Shore A
  • Temperature range: -350°F to +500°F (-212°C to +260°C)
  • Measurement type: Imperial
  • Pack quantity: 50 per package
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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 (5.0 / 5 · 5 reviews)

Brian X. ★★★★★

I needed o-rings that could handle extreme temperature swings in my lab setup, and these PTFE ones have performed flawlessly from cryogenic to high-heat cycles. The 20-durometer material seals tightly without deforming.

Thomas ★★★★★

These 20-durometer rings are much softer than standard PTFE, which made them perfect for a low-pressure seal I needed where a harder ring would have leaked. The package of 50 gives me plenty of spares for future projects too.

Aurora M. ★★★★★

That wide temperature range was the deciding factor for me—nothing else I found handles both cryogenic and 500°F conditions. The 20 durometer stiffness means they hold their shape perfectly during installation, and the 0.139" cross-section fit the groove snugly. Just what I needed for a demanding se