Mutual Screw & Supply

0.139" CS X 4.109" ID Buna-N Nitrile O-Rings | AS568-243 | Dash 243 | 70 Durometer | Black (150 / Pkg.)

0.139" CS X 4.109" ID Buna-N Nitrile O-Rings | AS568-243 | Dash 243 | 70 - Main image
$38.69 $53 In stock

Buna-N Nitrile o-rings in AS568-243, 4.109" 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: 243
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 4.109" (104.37 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 (5.0 / 5 · 5 reviews)

Emma ★★★★★

The 4.109" ID fit perfectly on my hydraulic cylinder, and the 70 durometer feels just right for the pressure rating. Exactly what I needed to finish the job.

Aurora E. ★★★★★

I had to replace a seal on an old compressor, and the 4.109" ID was exactly what the manual called for. So far they've held up great, and the 70 durometer is firm but not brittle like some cheaper o-rings I've used before.

Ella ★★★★★

The 0.139" cross-section on these AS568-243 o-rings is exactly what I needed for a hydraulics repair, and they feel more flexible than the cheaper ones I’ve tried. Seemed to slide right in without any tweaking, which saved me a lot of hassle.