Mutual Screw & Supply

0.139" CS X 4.859" ID Viton FKM O-Rings | AS568-249 | Dash 249 | 75 Durometer | Brown (20 / Pkg.)

0.139" CS X 4.859" ID Viton FKM O-Rings | AS568-249 | Dash 249 | 75 Durometer | - Main image
$37.04 $56.12 In stock

Viton FKM o-rings in AS568-249, 4.859" 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: 249
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 4.859" (123.42 mm)
  • Durometer: 75 Shore A
  • Color: Brown
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 20 per package
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

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)

John ★★★★★

These o-rings fit perfectly on the hydraulic cylinder I was rebuilding, and the dark brown color made them easy to spot against the metal parts. The 75 durometer feels just right for the application, and knowing they can handle up to 400°F gives me peace of mind for my hot oil system.

Adam D. ★★★★★

Had to replace a seal on a high-temp compressor and these 75 durometer FKM rings handled the 350°F operating temp without any issue. The brown color made them easy to spot during installation too.

Steven I. ★★★★★

I needed high-temp o-rings for a steam valve rebuild, and these Viton ones held up perfectly at 350°F without any softening. The brown color makes them easy to spot during installation, which saved me time.