Mutual Screw & Supply

0.139" CS X 3.984" ID PTFE O-Rings | AS568-242 | Dash 242 | 24 Durometer (10 / Pkg.)

0.139" CS X 3.984" ID PTFE O-Rings | AS568-242 | Dash 242 | 24 Durometer (10 / - Main image
$41.62 $56.24 In stock

PTFE o-rings in AS568-242, 3.984" 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: 242
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.984" (101.19 mm)
  • Durometer: 24 Shore A
  • Temperature range: -350°F to +500°F (-212°C to +260°C)
  • Measurement type: Imperial
  • Pack quantity: 10 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)

Ella O. ★★★★★

Installed these on a high-temp air dryer that kept blowing out standard Buna-N seals. The PTFE material handled the 400°F cycling without any issues.

Sebastian ★★★★★

I'm impressed by how well these PTFE o-rings hold up under extreme heat; the 24 durometer strikes a nice balance between flexibility and durability for my high-temp sealing application.

Edward ★★★★★

These fit my application perfectly; the 0.139" cross-section is noticeably more rigid than the rubber ones I've used before. I needed the wide temperature range for a steam seal, and they're holding up great after a week of use.