Mutual Screw & Supply

0.139" CS X 1.421" ID Buna-N Nitrile O-Rings | AS568-221 | Dash 221 | Square Profile | 70 Durometer (250 / Pkg.)

0.139" CS X 1.421" ID Buna-N Nitrile O-Rings | AS568-221 | Dash 221 | Square - Main image
$41.98 $59.12 In stock

Buna-N Nitrile o-rings in AS568-221, 1.421" 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 (Square Profile)
  • Material: Buna-N Nitrile
  • AS568 dash size: 221
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 1.421" (36.09 mm)
  • Durometer: 70 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 250 per package
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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)

Penelope ★★★★★

The square profile is a nice change from round o-rings—it seated firmly in my groove without rolling around during assembly. The 70 durometer hardness gave me confidence it'll hold up in the -40°F range I'm working with.

Lucy X. ★★★★★

The 70 durometer feels just right for my hydraulic fittings—not too soft, not too stiff. These square profile o-rings seated perfectly and held pressure on the first try. Exactly what I needed for a reliable seal in high-temp applications.

Christopher ★★★★★

The square profile on these o-rings seated perfectly into the groove on my hydraulic cylinder, and the 0.139" cross-section gave it a much more secure fit than the round ones I've used before.