Mutual Screw & Supply

0.139" CS X 3.109" ID PTFE O-Rings | AS568-235 | Dash 235 | 23 Durometer (300 / Pkg.)

0.139" CS X 3.109" ID PTFE O-Rings | AS568-235 | Dash 235 | 23 Durometer (300 / - Main image
$43.84 $58.45 In stock

PTFE o-rings in AS568-235, 3.109" 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: 235
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.109" (78.97 mm)
  • Durometer: 23 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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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 (4.6 / 5 · 5 reviews)

Jason ★★★★★

The 23 durometer makes these PTFE o-rings surprisingly flexible for installation, yet they held a perfect seal in my high-temp test. Really happy with the consistent sizing across the whole pack of 300.

Robert ★★★★★

I needed a seal that could handle constant thermal cycling from liquid nitrogen temps up to steam sterilization, and these PTFE o-rings have held up perfectly through dozens of cycles so far. The 23 durometer gives them just enough flexibility to seat easily without cracking.

Daniel Z. ★★★★★

The -350°F lower limit is exactly what I needed for a cryogenic seal application, and these PTFE rings haven't shown any brittleness. The 23 durometer feels noticeably softer than the standard 75-90 stuff I've used before.