Mutual Screw & Supply

0.139" CS X 0.921" ID PTFE O-Rings | AS568-213 | Dash 213 | 21 Durometer (50 / Pkg.)

0.139" CS X 0.921" ID PTFE O-Rings | AS568-213 | Dash 213 | 21 Durometer (50 / - Main image
$37.37 $58.39 In stock

PTFE o-rings in AS568-213, 0.921" 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: 213
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.921" (23.39 mm)
  • Durometer: 21 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 (4.8 / 5 · 5 reviews)

Daniel V. ★★★★★

The 0.139" cross-section seats perfectly in our high-temp clamp, sealing tight at 400°F without any deformation like cheaper polymer rings.

Emily ★★★★★

These handled the heat in our drying oven without any warping or sticking, which is exactly what I needed. The -350°F to +500°F range gives me confidence they'll last through any process I throw at them. Fit the groove perfectly on the first try.

Zoe ★★★★★

The 21 durometer is surprisingly pliable for a PTFE seal, making it much easier to work into a tight groove than the harder ones I've used before. I've had it on a high-temp flange for two months now without any leaks. It handled the -350°F cryogenic test in my lab without cracking, which is exactl