Mutual Screw & Supply

0.139" CS X 1.421" ID Buna-N Nitrile O-Rings | AS568-221 | Dash 221 | 50 Durometer (120 / Pkg.)

0.139" CS X 1.421" ID Buna-N Nitrile O-Rings | AS568-221 | Dash 221 | 50 - Main image
$33.89 $52.95 In stock

Buna-N Nitrile o-rings in AS568-221, 1.421" inner diameter by 0.139" cross-section. Service range -40°F to +250°F (-40°C to +121°C). Also known as NBR, Buna-N, Chemigum, Hycar, Perbunan.

Specifications

  • Product type: O-Ring
  • Material: Buna-N Nitrile
  • AS568 dash size: 221
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 1.421" (36.09 mm)
  • Durometer: 50 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 120 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 (4.6 / 5 · 5 reviews)

Andrew D. ★★★★★

These rings seated perfectly snug without needing a mallet, and the 1.421" inner diameter matched my gauge exactly. A full box of 120 gives plenty of spares for future projects.

Ella ★★★★★

The 50 durometer softness is exactly what I needed for a low-pressure seal on my hydraulic fitting—it deformed just enough to seat perfectly without squishing out. This 120-pack at this size will last me years of rebuilds.

Grace X. ★★★★★

These o-rings fit perfectly in a hydraulic fitting I was rebuilding, and the 50 durometer material sealed without needing excessive force. The 120-count package gave me plenty of extras for future repairs.