Mutual Screw & Supply

0.139" CS X 1.421" ID PTFE O-Rings | AS568-221 | Dash 221 | 22 Durometer (300 / Pkg.)

0.139" CS X 1.421" ID PTFE O-Rings | AS568-221 | Dash 221 | 22 Durometer (300 / - Main image
$34.99 $50.71 In stock

PTFE o-rings in AS568-221, 1.421" 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: 221
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 1.421" (36.09 mm)
  • Durometer: 22 Shore A
  • Temperature range: -350°F to +500°F (-212°C to +260°C)
  • Measurement type: Imperial
  • Pack quantity: 300 per package
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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 (4.8 / 5 · 5 reviews)

Natalie N. ★★★★★

I needed a seal that could handle extreme cryo temps, and these PTFE o-rings fit the dash 221 size perfectly on my vacuum flange. They held up without any sign of brittleness during a liquid nitrogen test, which is exactly what I was hoping for.

Edward W. ★★★★★

Finally, o-rings that don’t deform under heat. I’ve used these in a steam application and the -350°F to +500°F range is no joke—they held their shape perfectly after hours of cycling. The 22 durometer gives them a nice, pliable feel that seals better than the harder stuff I’ve tried.

Eli Z. ★★★★★

These arrived well-packed and the 22 durometer PTFE feels dense enough for my high-temp application. So far they’re holding up perfectly against both chemical exposure and the temperature swings I need.