Mutual Screw & Supply

0.139" CS X 3.984" ID Buna-N Nitrile O-Rings | AS568-242 | Dash 242 | 70 Durometer | Black (150 / Pkg.)

0.139" CS X 3.984" ID Buna-N Nitrile O-Rings | AS568-242 | Dash 242 | 70 - Main image
$37.9 $51.21 In stock

Buna-N Nitrile o-rings in AS568-242, 3.984" 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: 242
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 3.984" (101.19 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)

Steven ★★★★★

The 0.139" cross-section feels substantial and seals perfectly in my air compressor line. This batch of 150 should last me years.

Abigail G. ★★★★★

The temperature range is what sold me, since my application sees some serious heat and cold swings. These 3.984" ID rings seated perfectly into the groove with no stretching issues, and the 70 durometer gives just the right amount of firmness. I'll be ordering these again.

Owen ★★★★★

That 0.139" cross-section was exactly what I needed to seat properly in a deep groove on an old hydraulic cylinder. They stretched into place without tearing and the pack of 150 should last me for years.