Mutual Screw & Supply

0.07" CS X 3.739" ID Buna-N Nitrile O-Rings | AS568-044 | Dash 044 | 70 Durometer | Black (250 / Pkg.)

0.07" CS X 3.739" ID Buna-N Nitrile O-Rings | AS568-044 | Dash 044 | 70 - Main image
$34.7 $53.38 In stock

Buna-N Nitrile o-rings in AS568-044, 3.739" inner diameter by 0.07" 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: 044
  • Cross-section: 0.07" (1.78 mm)
  • Inner diameter: 3.739" (94.97 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • 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: 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)

Aurora ★★★★★

The 250-count box is perfect for stocking up, since I burn through these during seasonal rebuilds. The 70-durometer hardness feels just right for a snug seal in the 3.739" bore, and the black Buna-N held up through a hot oil bath without any swelling.

Nicholas ★★★★★

I’ve been using these o-rings for a plumbing repair on a hydraulic clamp, and the -40°F to 250°F service range gives me confidence they’ll hold up in my unheated garage. The 0.07-inch cross-section sealed the connection perfectly with zero leaks.

Steven ★★★★★

The 70-durometer material feels sturdy and seals perfectly on my hydraulic reservoir. I've used them in a range of temperatures from the freezer to near-boiling water without any leaks.