Mutual Screw & Supply

0.139" CS X 1.171" ID PTFE O-Rings | AS568-217 | Dash 217 | 21 Durometer (35 / Pkg.)

0.139" CS X 1.171" ID PTFE O-Rings | AS568-217 | Dash 217 | 21 Durometer (35 / - Main image
$39.33 $55.4 In stock

PTFE o-rings in AS568-217, 1.171" 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: 217
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 1.171" (29.74 mm)
  • Durometer: 21 Shore A
  • Temperature range: -350°F to +500°F (-212°C to +260°C)
  • Measurement type: Imperial
  • Pack quantity: 35 per package
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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)

Lucy Z. ★★★★★

The -350°F to +500°F range sold me, and so far these have held up perfectly in a cryo test rig without any deformation. The 21 durometer is softer than I expected for PTFE, but that made installation a breeze without cracking.

Michael B. ★★★★★

Used these for a high-temp compressor seal and they've held up perfectly. The 21 durometer is soft enough to conform nicely without leaking.

David N. ★★★★★

I put these on a vacuum fitting that sees cold cycling and they’ve held up perfectly without any hardening. The wide temperature range is exactly what I needed for my lab setup—no leaks so far after a month of use.