Mutual Screw & Supply

0.139" CS X 3.484" ID Silicone O-Rings | AS568-238 | Dash 238 | FDA Compliant | 70 Durometer | Red (50 / Pkg.)

0.139" CS X 3.484" ID Silicone O-Rings | AS568-238 | Dash 238 | FDA Compliant | - Main image
$34.7 $56.88 In stock

Silicone o-rings in AS568-238, 3.484" inner diameter by 0.139" 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: 238
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.484" (88.49 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: 50 per package
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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 (4.6 / 5 · 5 reviews)

Owen S. ★★★★★

Finally managed to swap out the old seals on my hot water tank with these, and the 70 durometer silicone feels way more pliable than the previous ones I’d tried. The red color makes them easy to spot during installation, which is a nice bonus.

Aurora ★★★★★

Needed a replacement for a perished gasket in a hot-air line and these FDA-compliant red ones fit the groove perfectly, no trimming required. The 70 durometer feels just right—firm enough to seat well but still squeezes into place with a bit of effort. Fifty in the pack means I've got spares for the

Ryan U. ★★★★★

The temperature range on these is what sold me, and they haven't disappointed in a high-heat application where my old ones kept failing. The red color makes them easy to spot during assembly, and the 70 durometer feels just right for a snug seal without being a nightmare to install.