Mutual Screw & Supply

0.139" CS X 5.859" ID Silicone O-Rings | AS568-257 | Dash 257 | FDA Compliant | 70 Durometer | Red (20 / Pkg.)

0.139" CS X 5.859" ID Silicone O-Rings | AS568-257 | Dash 257 | FDA Compliant | - Main image
$37.75 $51.01 In stock

Silicone o-rings in AS568-257, 5.859" 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: 257
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.859" (148.82 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: 20 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)

Adam D. ★★★★★

The high-temp range is exactly what I needed for a baking application; these have held up perfectly at 400°F without any degradation. The FDA compliance gave me peace of mind for food contact, and the red color is a nice bonus.

Christopher U. ★★★★★

I've been burned by cheap gaskets that warp in hot oil before, but these red ones haven't softened or deformed a bit at frying temperatures. The 70 durometer feels just right—firm enough to seal tight under pressure, yet it popped into the groove without me fighting it.

Benjamin ★★★★★

Installed these on a home brewing kettle and the high-temp silicone handled boiling water without any issues. The red color also makes them easy to spot if they drop.