Mutual Screw & Supply

0.139" CS X 0.546" ID PTFE O-Rings | AS568-207 | Dash 207 | 20 Durometer (40 / Pkg.)

0.139" CS X 0.546" ID PTFE O-Rings | AS568-207 | Dash 207 | 20 Durometer (40 / - Main image
$32.82 $54.7 In stock

PTFE o-rings in AS568-207, 0.546" 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: 207
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.546" (13.87 mm)
  • Durometer: 20 Shore A
  • Temperature range: -350°F to +500°F (-212°C to +260°C)
  • Measurement type: Imperial
  • Pack quantity: 40 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 (4.6 / 5 · 5 reviews)

Christopher ★★★★★

Installed these in a cryo valve assembly where viton just wouldn't cut it. The 20-durometer PTFE was surprisingly pliable yet seals perfectly at -300°F.

Robert ★★★★★

These held up perfectly in a high-temp sealing application where regular rubber rings would have melted. The 20 durometer PTFE is surprisingly flexible for a Teflon material, and the price for a pack of 40 is hard to beat.

Stella ★★★★★

The 20 durometer rating on these PTFE o-rings is much softer than I expected, which made installation in a tight groove a breeze. They fit the AS568-207 spec perfectly and held up during a high-temp test cycle.