Mutual Screw & Supply

0.139" CS X 5.609" ID Viton FKM O-Rings | AS568-255 | Dash 255 | 75 Durometer | Black (14 / Pkg.)

0.139" CS X 5.609" ID Viton FKM O-Rings | AS568-255 | Dash 255 | 75 Durometer | - Main image
$36.71 $52.44 In stock

Viton FKM o-rings in AS568-255, 5.609" 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: 255
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.609" (142.47 mm)
  • Durometer: 75 Shore A
  • Color: Black
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 14 per package
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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 (5.0 / 5 · 5 reviews)

Sebastian ★★★★★

The 5.609" inner diameter fit perfectly on my hydraulic cylinder flange, and the 75 durometer feels firm but not brittle at room temp. Installed easily without any rolling or twisting.

Jason ★★★★★

The temp range on these is exactly why I grabbed them for my compressor rebuild—no more melting worries. They seated perfectly in the groove and fit like they were made for the job.

Lucy ★★★★★

These 75-durometer Viton O-rings handled a 350°F oil bath in my compressor without any swelling or hardening. The 5.609" ID fit perfectly on the first try, and the .139" cross-section feels robust enough for repeated pressure cycles.