Mutual Screw & Supply

0.139" CS X 11.234" ID Buna-N Nitrile O-Rings | AS568-281 | Dash 281 | 70 Durometer | Black (14 / Pkg.)

0.139" CS X 11.234" ID Buna-N Nitrile O-Rings | AS568-281 | Dash 281 | 70 - Main image
$38.07 $51.45 In stock

Buna-N Nitrile o-rings in AS568-281, 11.234" 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: 281
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 11.234" (285.34 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 14 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)

Joshua M. ★★★★★

The 11.234" inner diameter was spot on for my air compressor rebuild, and the 70 durometer hardness feels exactly like the OEM part. These Buna-N rings handled the 200°F operating temp without any softening or swelling after a week of heavy use.

Lucy ★★★★★

Needed a large o-ring for a hydraulic pump rebuild, and the 11.234" inner diameter fit perfectly. The rubber feels firm and dense, exactly the 70 durometer I was looking for. Should last a good while at these operating temperatures.

Christopher G. ★★★★★

Used these to replace worn seals on a hydraulic cylinder and the 70 durometer feels just right for the application. They fit the AS568-281 groove perfectly and the Buna-N material should handle the temperature range fine.