Mutual Screw & Supply

0.21" CS X 0.412" ID Silicone O-Rings | AS568-309 | Dash 309 | FDA Compliant | 70 Durometer | Red (200 / Pkg.)

0.21" CS X 0.412" ID Silicone O-Rings | AS568-309 | Dash 309 | FDA Compliant | - Main image
$37.45 $59.44 In stock

Silicone o-rings in AS568-309, 0.412" 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: 309
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 0.412" (10.46 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: 200 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 (4.4 / 5 · 5 reviews)

Stella O. ★★★★★

These red o-rings handled a steam line at 400°F without any softening or deformation, which is exactly what I needed for a high-temp setup. The 70 durometer feels firm yet pliable, and the 200-count pack means I’ve got spares for the next dozen projects.

Adam ★★★★★

I was replacing the seals on a hot water valve and these o-rings fit perfectly with the 0.412" inner diameter. The red silicone seems durable and the pack of 200 should last me for years.

Thomas K. ★★★★★

Took a gamble on the exact size I needed for a stubborn valve rebuild, and the 0.412" ID fit perfectly on the first try. The silicone feels dense and solid, not flimsy like some cheap packs I've grabbed before. Great to know they'll handle the heat range if I ever push them near the limit.