Mutual Screw & Supply

0.139" CS X 3.734" ID Viton FKM O-Rings | AS568-240 | Dash 240 | 75 Durometer | Brown (25 / Pkg.)

0.139" CS X 3.734" ID Viton FKM O-Rings | AS568-240 | Dash 240 | 75 Durometer | - Main image
$36.14 $54.76 In stock

Viton FKM o-rings in AS568-240, 3.734" inner diameter by 0.139" cross-section. Service range -15°F to +400°F (-26°C to +204°C). Also known as FKM, Fluoroelastomer.

Specifications

  • Product type: O-Ring
  • Material: Viton FKM
  • AS568 dash size: 240
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.734" (94.84 mm)
  • Durometer: 75 Shore A
  • Color: Brown
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 25 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 (4.8 / 5 · 5 reviews)

Olivia ★★★★★

These fit perfectly on my hydraulic manifold and stopped a slow leak that cheaper Buna rings couldn't handle. The brown Viton feels noticeably more substantial than standard black o-rings.

Robert ★★★★★

Been running these at 400°F in a steam line for a week now with zero leaks—the Viton FKM handles the heat way better than my old Buna-N rings ever did. The 0.139" cross-section feels substantial and seals tight. Exactly what I needed for this application.

Sebastian ★★★★★

Pulled one of these out after a 350°F autoclave cycle and it still had its shape perfectly. The 75 durometer feels noticeably firmer than the standard Buna-N I've been swapping out. Exactly what I needed for high-temp hydraulic seals.