Mutual Screw & Supply

0.21" CS X 0.537" ID Silicone O-Rings | AS568-311 | Dash 311 | FDA Compliant | 70 Durometer | Red (200 / Pkg.)

0.21" CS X 0.537" ID Silicone O-Rings | AS568-311 | Dash 311 | FDA Compliant | - Main image
$48.79 $65.05 In stock

Silicone o-rings in AS568-311, 0.537" 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: 311
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 0.537" (13.64 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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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)

Scarlett A. ★★★★★

The 70 durometer is exactly right for my rebuilds—firm enough to seal without fighting me during installation. I've had them on a hot manifold for three weeks and they haven't softened or deformed at all.

Sebastian C. ★★★★★

The red color makes them easy to spot during assembly, and the 70 durometer hardness gives just the right amount of give without feeling flimsy. I've used a handful already and they fit perfectly in the groove I needed them for.

Matthew P. ★★★★★

The -80°F to +450°F range is exactly why I grabbed these, and so far they've held up perfectly in a steam line that keeps cycling hot and cold. The red color also makes them easy to spot when I'm digging through my parts bin.