Mutual Screw & Supply

Buna-N Nitrile O-Rings | AS568-051 | Dash 051 | 70 Durometer | Black (30 / Pkg.)

Buna-N Nitrile O-Rings | AS568-051 | Dash 051 | 70 Durometer | Black (30 / Pkg.) - Main image
$35.51 $51.47 In stock

Buna-N Nitrile o-rings in AS568-051. 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: 051
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 30 per package
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When it ships

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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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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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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)

Evelyn N. ★★★★★

The 70 durometer hardness is perfect for my low-pressure air fittings—they seal tight without being too stiff to install. I've used them on several projects and they hold up well even with minor temperature swings.

Carter ★★★★★

Finally got around to replacing the old o-rings on my hydraulic fitting and these 70 durometer Buna-N ones sealed up perfectly on the first try. The pack of 30 gives you plenty of spares for future projects.

Chloe X. ★★★★★

I needed a few of these for a quick plumbing repair and the -40°F to +250°F range gives me confidence they’ll hold up in my hot water line. They fit the groove snugly and the black Buna-N material feels durable. No leaks so far after a week of use.