Mutual Screw & Supply

0.139" CS X 5.484" ID Viton FKM O-Rings | AS568-254 | Dash 254 | X-Ring | 70 Durometer (6 / Pkg.)

0.139" CS X 5.484" ID Viton FKM O-Rings | AS568-254 | Dash 254 | X-Ring | 70 - Main image
$37.43 $57.58 In stock

Viton FKM o-rings in AS568-254, 5.484" 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 (X-Ring)
  • Material: Viton FKM
  • AS568 dash size: 254
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.484" (139.29 mm)
  • Durometer: 70 Shore A
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 6 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 (5.0 / 5 · 5 reviews)

Ruby ★★★★★

I’ve been using these for a high-temp pneumatic valve rebuild, and they held up perfectly at sustained 350°F. The 70 durometer feels just right—not too stiff, not too soft. Fit the groove exactly as expected.

Brian ★★★★★

Needed a tighter seal on a subzero temp pneumatic line, and these Viton FKM o-rings with the 70 durometer really held up without leaking. The 5.484" ID was a perfect fit right out of the package.

Stella ★★★★★

These hit the spot for a hot oil line I run at around 300°F, and the 70 durometer feels just right for sealing without being too stiff. The 5.484" ID fit the groove perfectly with no wrestling, and they've held up for a month straight without any leaks.