Mutual Screw & Supply

0.139" CS X 3.984" ID Viton FKM O-Rings | AS568-242 | Dash 242 | 75 Durometer | Brown (25 / Pkg.)

0.139" CS X 3.984" ID Viton FKM O-Rings | AS568-242 | Dash 242 | 75 Durometer | - Main image
$41.29 $58.15 In stock

Viton FKM o-rings in AS568-242, 3.984" 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: 242
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.984" (101.19 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 (4.4 / 5 · 5 reviews)

Riley ★★★★★

The high temp rating of 400°F is exactly what I needed for a steam application near my boiler. These Viton FKM rings went on perfectly and sealed tight first try. The 75 durometer feels just right, not too hard or soft.

Violet ★★★★★

Installed these on my hydraulic cylinder that sees constant heat cycles, and the 400°F rating gives me total peace of mind. The brown color actually makes them easy to spot during assembly, which is a nice bonus.

Eli B. ★★★★★

The temperature range on these is the real selling point for me, since I've had standard o-rings fail in hot oil before. These Viton ones held up through a 350°F test run without any hardening, and the 75 durometer feels nicely firm. Just wish they came in smaller pack sizes, but 25 is a solid value