Mutual Screw & Supply

0.139" CS X 0.421" ID Silicone O-Rings | AS568-205 | Dash 205 | FDA Compliant | 70 Durometer | Red (300 / Pkg.)

0.139" CS X 0.421" ID Silicone O-Rings | AS568-205 | Dash 205 | FDA Compliant | - Main image
$36.38 $58.67 In stock

Silicone o-rings in AS568-205, 0.421" 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: 205
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.421" (10.69 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: 300 per package
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.4 / 5 · 5 reviews)

Sebastian S. ★★★★★

Red silicone rings in the standard AS568-205 size, and the 70 durometer feels just right for a snug seal without being a fight to install. I’ve used them in a few hot applications up to the 450°F spec and they’ve held their shape fine. Good value for a three-hundred count bag.

Emily O. ★★★★★

The high-temp rating on these is exactly what I needed for a steam line repair, and the 70 durometer feels just right. They seated perfectly in the groove without any twisting or stretching issues.

Riley ★★★★★

The 70 durometer silicone feels sturdy yet flexible, and the 0.421" ID fit my valve stem perfectly. Having a full 300-pack means I can finally stop rationing spares. The red color makes them easy to spot during reassembly, which is a small but real convenience.