Mutual Screw & Supply

0.139" CS X 0.609" ID PTFE O-Rings | AS568-208 | Dash 208 | 20 Durometer (50 / Pkg.)

0.139" CS X 0.609" ID PTFE O-Rings | AS568-208 | Dash 208 | 20 Durometer (50 / - Main image
$39.76 $53.01 In stock

PTFE o-rings in AS568-208, 0.609" 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: 208
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.609" (15.47 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)

Zoe ★★★★★

The temperature range on these is genuinely wild, so I used them in a hot oil line without any softening. They’re squishy enough at 20 durometer to seat easily, yet they held their shape perfectly during install.

Zoe Q. ★★★★★

I needed a super soft seal for a cryogenic application, and these 20 durometer PTFE rings handled the -350°F range without any cracking. The 0.139" cross-section seated snugly in the groove, too.

Riley ★★★★★

These o-rings fit perfectly into a high-temp seal repair on an old vacuum chamber. The 20 durometer PTFE gave just enough flexibility to seat properly without cracking in the cold.