Mutual Screw & Supply

0.139" CS X 0.859" ID Buna-N Nitrile O-Rings | AS568-212 | Dash 212 | X-Ring | 70 Durometer (300 / Pkg.)

0.139" CS X 0.859" ID Buna-N Nitrile O-Rings | AS568-212 | Dash 212 | X-Ring | - Main image
$34.93 $55.45 In stock

Buna-N Nitrile o-rings in AS568-212, 0.859" 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: 212
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.859" (21.82 mm)
  • Durometer: 70 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 300 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)

Alexander ★★★★★

The 70 durometer is just right for my compressor rebuilds—firm enough to seal tight but not a hassle to install. No issues with leaks after a week of testing. This pack will last me years.

Hazel J. ★★★★★

I needed a big batch for a hydraulic repair job, and the 0.859" inner diameter fits the shaft perfectly. The 70 durometer has just enough give for a solid seal without being too stiff.

Eli ★★★★★

The 0.859" inner diameter was spot-on for my hydraulic repair, and the 70 durometer feel is firm but not brittle. I've used cheaper o-rings before that cracked quickly, but these Buna-N ones seem much more durable. Pack of 300 is more than enough for a few jobs.