Mutual Screw & Supply

0.139" CS X 1.234" ID Buna-N Nitrile O-Rings | AS568-218 | Dash 218 | X-Ring | 70 Durometer (200 / Pkg.)

0.139" CS X 1.234" ID Buna-N Nitrile O-Rings | AS568-218 | Dash 218 | X-Ring | - Main image
$34.96 $50.67 In stock

Buna-N Nitrile o-rings in AS568-218, 1.234" 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 (X-Ring)
  • Material: Buna-N Nitrile
  • AS568 dash size: 218
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 1.234" (31.34 mm)
  • Durometer: 70 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 200 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 (4.6 / 5 · 5 reviews)

Adam ★★★★★

After fighting with some old o-rings that kept splitting during installation, these 70 durometer buna-ns popped right on without any tearing. The -40°F to +250°F range gives me confidence they'll hold up in my hydraulic system through the winter.

Joseph ★★★★★

The 200-piece pack is exactly what I needed for my hobby projects, and the 1.234" ID fits perfectly on my fittings. They're holding up well under hot water, no leaks so far.

Lucy ★★★★★

The 70 durometer feels just right—firm enough to hold pressure but still easy to work into the groove. I’ve been using these for a hydraulic seal project, and the -40°F rating gives me peace of mind for outdoor equipment in winter.