Mutual Screw & Supply

0.139" CS X 4.109" ID Silicone O-Rings | AS568-243 | Dash 243 | FDA Compliant | 70 Durometer | Red (40 / Pkg.)

0.139" CS X 4.109" ID Silicone O-Rings | AS568-243 | Dash 243 | FDA Compliant | - Main image
$36.12 $50.16 In stock

Silicone o-rings in AS568-243, 4.109" 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: 243
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 4.109" (104.37 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: 40 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 (5.0 / 5 · 5 reviews)

Chloe O. ★★★★★

I needed high-temp seals for a home brewing setup, and these silicone rings handle the steam without degrading. The -80°F to +450°F range gives me confidence they’ll last. They seated perfectly on my pot’s lid flange.

Stella R. ★★★★★

These fit my commercial kettle’s lid perfectly, and the red color makes them easy to spot during cleaning. The 70-durometer silicone feels durable yet pliable, handling my 400°F sterilization cycles without any issue.

John X. ★★★★★

I needed a high-temp seal for a laboratory drying oven, and these held up perfectly through repeated 400°F cycles. The red silicone is easy to spot during maintenance checks, and the 70 durometer feels pliable yet durable. Exactly what I needed for this application.