Mutual Screw & Supply

0.21" CS X 12.975" ID Silicone O-Rings | AS568-379 | Dash 379 | FDA Compliant | 70 Durometer | Red (8 / Pkg.)

0.21" CS X 12.975" ID Silicone O-Rings | AS568-379 | Dash 379 | FDA Compliant | - Main image
$32.54 $53.35 In stock

Silicone o-rings in AS568-379, 12.975" inner diameter by 0.21" cross-section. Service range -80°F to +450°F (-62°C to +232°C). Also known as VMQ, Silastic.

Specifications

  • Product type: O-Ring
  • Material: Silicone
  • AS568 dash size: 379
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 12.975" (329.56 mm)
  • Durometer: 70 Shore A
  • Color: Red
  • Temperature range: -80°F to +450°F (-62°C to +232°C)
  • Measurement type: Imperial
  • Compliance: FDA 21 CFR 177.2600
  • Pack quantity: 8 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)

Joseph ★★★★★

I needed something that could handle high heat for a commercial sealing project, and these red silicone rings fit the bill perfectly. The 70 durometer feels just right — firm enough to hold a seal but not too stiff to install.

William ★★★★★

Finally, a 12.975" ID ring that actually seals without me having to wrestle it on with tools. The 70 durometer gives just the right squish, and these red ones are easy to spot when I'm swapping parts. Replacing the old batch with these was a twenty-minute job, and so far, zero leaks at our standard

Penelope ★★★★★

These handled the 230°F heat cycling on my custom gasket setup without any visible wear or hardening. The 70 durometer strikes a nice balance—firm enough to hold a seal, soft enough to deform and seat properly.