Mutual Screw & Supply

0.103" CS X 1.049" ID Viton FKM O-Rings | AS568-121 | Dash 121 | 90 Durometer (250 / Pkg.)

0.103" CS X 1.049" ID Viton FKM O-Rings | AS568-121 | Dash 121 | 90 Durometer - Main image
$41.76 $62.33 In stock

Viton FKM o-rings in AS568-121, 1.049" inner diameter by 0.103" cross-section. Service range -15°F to +400°F (-26°C to +204°C). Also known as FKM, Fluoroelastomer.

Specifications

  • Product type: O-Ring
  • Material: Viton FKM
  • AS568 dash size: 121
  • Cross-section: 0.103" (2.62 mm)
  • Inner diameter: 1.049" (26.64 mm)
  • Durometer: 90 Shore A
  • Temperature range: -15°F to +400°F (-26°C to +204°C)
  • Measurement type: Imperial
  • Pack quantity: 250 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 (4.8 / 5 · 5 reviews)

Henry ★★★★★

Installed a set on a hot oil pump flange that's been eating standard Buna rings in weeks; the Viton held up perfectly through multiple 350°F cycles. The 90 durometer gives them a nice firm feel that doesn't squirm out of the groove under pressure.

Ella ★★★★★

Finally used these to rebuild a high-temp steam valve that kept leaking with standard Buna. The 90 durometer Viton feels much stiffer going on, but it seals perfectly and hasn't hardened after multiple cycles up to 400°F. Exactly what I needed for that application.

Avery V. ★★★★★

Installed these in a pneumatic actuator running near 350°F; they sealed perfectly with no leaks after a week of cycling. The 90 durometer feels noticeably firmer than standard Buna-N, which gives me confidence for long-term use.