Mutual Screw & Supply

0.21" CS X 1.162" ID Buna-N Nitrile O-Rings | AS568-321 | Dash 321 | 90 Durometer (250 / Pkg.)

0.21" CS X 1.162" ID Buna-N Nitrile O-Rings | AS568-321 | Dash 321 | 90 - Main image
$34.31 $56.25 In stock

Buna-N Nitrile o-rings in AS568-321, 1.162" 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: 321
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 1.162" (29.51 mm)
  • Durometer: 90 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)

Timothy U. ★★★★★

I needed a reliable seal for my hydraulic cylinder and the 90 durometer on these definitely holds up better than the standard 70. The 1.162" inner diameter fit perfectly on the first try.

Ruby ★★★★★

These 90-durometer Buna-N rings feel noticeably firmer than the standard ones I've used, which should hold up better under compression. The 1.162" ID fit snugly on my hydraulic fitting without any struggle. Exactly what I needed for a high-pressure application that ran up to 200°F.

Elizabeth ★★★★★

I needed a batch of dash 321 o-rings for a hydraulic repair, and these came in a solid 250-count pack. The 90-durometer material feels noticeably stiffer than standard 70, which should hold up well in higher-pressure applications.