Mutual Screw & Supply

0.21" CS X 3.975" ID Viton FKM O-Rings | AS568-345 | Dash 345 | 75 Durometer | Brown (12 / Pkg.)

0.21" CS X 3.975" ID Viton FKM O-Rings | AS568-345 | Dash 345 | 75 Durometer | - Main image
$34.63 $56.77 In stock

Viton FKM o-rings in AS568-345, 3.975" inner diameter by 0.21" 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: 345
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 3.975" (100.97 mm)
  • Durometer: 75 Shore A
  • Color: Brown
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 12 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 (4.6 / 5 · 5 reviews)

Leo G. ★★★★★

The 75 durometer hardness is spot on for my hydraulic fittings—firm enough to seat properly but they compress without cracking. I ran one at 350°F for a few days straight and it held its shape, so the Viton compound is doing its job. Twelve in the pack is decent for the price.

Jason ★★★★★

Used these in a hot water pump that cycles near 190°F and they’ve held up perfectly without any swelling. The 75 durometer feels just right for this application.

Eli U. ★★★★★

Had to replace some old seals in a high-temp pneumatic actuator. These Viton rings handled the 350°F+ cycling without any softening or deformation. Exactly the 3.975" ID I needed for the groove.