Mutual Screw & Supply

0.139" CS X 2.359" ID PTFE O-Rings | AS568-229 | Dash 229 | 22 Durometer (14 / Pkg.)

0.139" CS X 2.359" ID PTFE O-Rings | AS568-229 | Dash 229 | 22 Durometer (14 / - Main image
$35.62 $51.63 In stock

PTFE o-rings in AS568-229, 2.359" 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: 229
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 2.359" (59.92 mm)
  • Durometer: 22 Shore A
  • Temperature range: -350°F to +500°F (-212°C to +260°C)
  • Measurement type: Imperial
  • Pack quantity: 14 per package
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Customer Reviews (5.0 / 5 · 5 reviews)

Thomas ★★★★★

The soft 22 durometer is what sold me—these aren't stiff like typical PTFE, so they seat nicely without fighting them into the groove. I've used them for a cryo fitting that sees constant thermal cycling and they've held their seal perfectly so far.

John ★★★★★

The wide -350°F to +500°F range was the deciding factor for me, and the 22 durometer feels reassuringly pliable for a PTFE seal. The 14-piece pack gives a good buffer for trial fits, and the precision of the 2.359" ID has been spot-on so far.

Olivia ★★★★★

These seals handled the cryogenic temps in my liquid nitrogen setup without any sign of brittleness or leaks. The 22 durometer flexibility made installation a breeze even on the tight flange.