Mutual Screw & Supply

0.139" CS X 0.421" ID Buna-N Nitrile O-Rings | AS568-205 | Dash 205 | 70 Durometer | Black (1000 / Pkg.)

0.139" CS X 0.421" ID Buna-N Nitrile O-Rings | AS568-205 | Dash 205 | 70 - Main image
$41.85 $58.94 In stock

Buna-N Nitrile o-rings in AS568-205, 0.421" 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
  • Material: Buna-N Nitrile
  • AS568 dash size: 205
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.421" (10.69 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 (4.8 / 5 · 5 reviews)

Lily U. ★★★★★

I needed a bulk pack of these AS568-205 o-rings for a pneumatic repair job and the 70 durometer hardness gives a nice firm seal without being too stiff. The service temperature range covers everything I expose them to.

Ryan F. ★★★★★

The 70 durometer feels just right for my pneumatic fittings—not too stiff, and not too soft. With 1000 in the bag, I’ve got plenty to rebuild several machines.

Adam Y. ★★★★★

I needed a bulk pack of o-rings for an outdoor air compressor rebuild, and these 1,000-count 205s hit the spec dead-on—the 70 durometer feels firm enough to hold pressure against 120 psi without deforming.