Mutual Screw & Supply

0.139" CS X 0.359" ID Buna-N Nitrile O-Rings | AS568-204 | Dash 204 | 70 Durometer | Black (1000 / Pkg.)

0.139" CS X 0.359" ID Buna-N Nitrile O-Rings | AS568-204 | Dash 204 | 70 - Main image
$36.27 $55.8 In stock

Buna-N Nitrile o-rings in AS568-204, 0.359" 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: 204
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.359" (9.12 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 1000 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 (4.4 / 5 · 5 reviews)

Richard G. ★★★★★

I was replacing the seals on an old hydraulic pump and these 204 o-rings fit perfectly, with the 70 durometer giving just the right firmness. The inner diameter at 0.359" matched my application exactly.

Ava U. ★★★★★

Needed a bulk supply of these 204 o-rings for a hydraulic rebuild project and the 70 durometer stiffness feels right for the job. At 0.139" cross-section they seal perfectly in the groove without being too hard to seat.

George X. ★★★★★

These o-rings are exactly the AS568-204 size I needed for a rebuild, and the 70 durometer feels properly firm. The package of a thousand means I'll have spares for years, and the black nitrile looks consistent across the batch.