Mutual Screw & Supply

0.139" CS X 3.984" ID Viton FKM O-Rings | AS568-242 | Dash 242 | 90 Durometer (30 / Pkg.)

0.139" CS X 3.984" ID Viton FKM O-Rings | AS568-242 | Dash 242 | 90 Durometer - Main image
$31.56 $52.6 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: 90 Shore A
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 30 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 (4.8 / 5 · 5 reviews)

Natalie C. ★★★★★

These handle the heat exactly as rated; I've had them on a 350°F steam line for two months and they're still sealing perfectly. The 90 durometer feels noticeably stiffer than my old Buna-Ns, which is what I needed here.

William ★★★★★

Had to replace some seals in a high-temp compressor and these viton o-rings handled the 350°F test cycle without any softening or swelling. The 90 durometer feels nice and firm when seated too.

Lily ★★★★★

These o-rings fit my hot oil system perfectly, and the 90 durometer feels stiff enough to hold a tight seal under pressure. The 3.984" inner diameter was exactly what my pump needed.