Mutual Screw & Supply

0.139" CS X 4.234" ID Buna-N Nitrile O-Rings | AS568-244 | Dash 244 | 70 Durometer | Black (150 / Pkg.)

0.139" CS X 4.234" ID Buna-N Nitrile O-Rings | AS568-244 | Dash 244 | 70 - Main image
$32.87 $54.78 In stock

Buna-N Nitrile o-rings in AS568-244, 4.234" 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: 244
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 4.234" (107.54 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 150 per package
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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

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Customer Reviews (4.8 / 5 · 5 reviews)

John B. ★★★★★

The 70 durometer feels just right for a snug seal without being too hard to install. Used a few on a hydraulic fitting and they held pressure perfectly, no leaks at all. Exactly the size needed for that odd dash 244 application.

Carter W. ★★★★★

These fit perfectly on the shaft I'm rebuilding and the 4.234" ID was exactly as listed, no guessing. I've had them sitting in my shop for a couple weeks in the heat and they still look fresh, so the nitrile should hold up fine.

George ★★★★★

The 70 durometer hardness is spot on for my application, and they seated perfectly in the groove without any twisting or binding. I've got a box of 150 now, so I'm set for a long time.