Mutual Screw & Supply

0.21" CS X 20.975" ID Buna-N Nitrile O-Rings | AS568-395 | Dash 395 | 70 Durometer | Black (8 / Pkg.)

0.21" CS X 20.975" ID Buna-N Nitrile O-Rings | AS568-395 | Dash 395 | 70 - Main image
$34.73 $56.93 In stock

Buna-N Nitrile o-rings in AS568-395, 20.975" inner diameter by 0.21" 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: 395
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 20.975" (532.76 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 8 per package
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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)

Ella B. ★★★★★

These are the exact size I needed for a hydraulic cylinder rebuild, and the 70 durometer hardness feels spot on for the application. The fact they're rated up to 250°F gives me peace of mind since the lines get pretty hot during operation.

Steven ★★★★★

Replaced the old worn-out seal on a big hydraulic ram with this size 395 and it fit perfectly. The 70 durometer feels about right for the constant 150 psi it sees, and after a week of operation there’s zero weeping at the gland. Exactly what I needed for a heavy-duty industrial fix.

Sofia K. ★★★★★

Installed these on a large pneumatic cylinder at work and the 70 durometer material sealed perfectly with no leaks, even after cycling at 150°F. The thickness seems consistent all the way around.