Mutual Screw & Supply

0.139" CS X 5.109" ID Silicone O-Rings | AS568-251 | Dash 251 | FDA Compliant | 70 Durometer | Red (22 / Pkg.)

0.139" CS X 5.109" ID Silicone O-Rings | AS568-251 | Dash 251 | FDA Compliant | - Main image
$33.21 $50.32 In stock

Silicone o-rings in AS568-251, 5.109" 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: 251
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.109" (129.77 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: 22 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 (4.6 / 5 · 5 reviews)

Charlotte ★★★★★

Replaced the old cracked rings on my pressure cooker with these and the seal is perfect, no leaks at all. The red color makes them easy to spot when I'm cleaning the lid, and the 70 durometer feels solid but not stiff.

Natalie N. ★★★★★

Installed these in a hot water valve application where I needed the high-temp rating up to 450°F, and they've held up perfectly with zero leaks. The snug fit on the 5.109" ID was exactly right for the groove.

Violet L. ★★★★★

The color-coding made sorting these from my other o-rings a breeze, and the high-temp rating suits my food processing equipment perfectly. They seat firmly without any squirming during installation.