Mutual Screw & Supply

0.139" CS X 0.296" ID Buna-N Nitrile O-Rings | AS568-203 | Dash 203 | 70 Durometer | Black (1000 / Pkg.)

0.139" CS X 0.296" ID Buna-N Nitrile O-Rings | AS568-203 | Dash 203 | 70 - Main image
$36.73 $52.47 In stock

Buna-N Nitrile o-rings in AS568-203, 0.296" 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: 203
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.296" (7.52 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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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)

Edward ★★★★★

The 70 durometer is exactly what I needed for a hydraulic fitting rebuild, and the 0.139" cross-section seated perfectly in the groove. Every ring in the bag measured up to spec, no deformed ones or flash to trim.

Mia ★★★★★

Finally found a source that actually has these harder-to-find dash 203 sizes in bulk. The 70 durometer feels just right for the hydraulic seal I rebuilt, and the whole box came neatly packed without any distortion.

Michael ★★★★★

I've been through a few boxes of these for rebuilding pneumatic cylinders, and the consistent sizing has saved me from leaks. The -40°F rating gives me confidence for outdoor gear in winter.