Mutual Screw & Supply

0.139" CS X 5.984" ID Viton FKM O-Rings | AS568-258 | Dash 258 | 75 Durometer | Black (14 / Pkg.)

0.139" CS X 5.984" ID Viton FKM O-Rings | AS568-258 | Dash 258 | 75 Durometer | - Main image
$40.16 $55.02 In stock

Viton FKM o-rings in AS568-258, 5.984" 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: 258
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.984" (151.99 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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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)

William E. ★★★★★

The 75 durometer rating gives these just enough firmness to hold a seal without being a bear to squeeze into place. They handled the 400°F range in my setup without any visible hardening or cracking.

Lucy E. ★★★★★

The 75 durometer hardness feels just right for a snug seal, and the viton material handled my steam line without any softening. I've bought cheaper nitrile rings before, but these are worth the extra cost for the 400°F rating alone.

Benjamin ★★★★★

Used these to fix a leak in a hot oil line at work, the -15°F to +400°F range gives me peace of mind. The 75 durometer feels pliable yet firm enough to hold a solid seal.