Mutual Screw & Supply

0.139" CS X 0.859" ID Buna-N Nitrile O-Rings | AS568-212 | Dash 212 | 50 Durometer (150 / Pkg.)

0.139" CS X 0.859" ID Buna-N Nitrile O-Rings | AS568-212 | Dash 212 | 50 - Main image
$35.9 $56.1 In stock

Buna-N Nitrile o-rings in AS568-212, 0.859" 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: 212
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.859" (21.82 mm)
  • Durometer: 50 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 150 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 (5.0 / 5 · 5 reviews)

Emma O. ★★★★★

These fit perfectly into my hydraulic cylinder rebuild kit—the 0.859" ID is spot on. The 50 durometer rubber feels supple yet durable, and they sealed the first time without any leaks.

Ryan ★★★★★

The 50 durometer was exactly what I needed for a plastic pneumatic fitting—provides a good seal without deforming the surface. These -212 size rings fit perfectly on my 7/8" shaft. Pack of 150 should last me for several rebuilds.

Kevin ★★★★★

I needed a softer seal for a low-pressure pneumatic application and these 50 durometer o-rings worked perfectly. The 0.859" ID fits my groove snugly, and the -40°F rating gives me peace of mind for winter use. Tough to beat the value at 150 per pack for a specific size like this.