Mutual Screw & Supply

0.21" CS X 0.412" ID Buna-N Nitrile O-Rings | AS568-309 | Dash 309 | 90 Durometer (500 / Pkg.)

0.21" CS X 0.412" ID Buna-N Nitrile O-Rings | AS568-309 | Dash 309 | 90 - Main image
$33.58 $53.3 In stock

Buna-N Nitrile o-rings in AS568-309, 0.412" 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: 309
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 0.412" (10.46 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 500 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)

Timothy ★★★★★

These 90 durometer rings are noticeably stiffer than the standard ones I've used, which makes them hold their shape perfectly in a tight groove. I just finished a plumbing repair and they seated without any rolling or pinching.

Joshua ★★★★★

I was a bit worried about buying o-rings in bulk, but the 90 durometer hardness here feels exactly right for my hydraulic fittings, and the 0.412" inner diameter seated perfectly. The package of 500 means I won't be scrambling for a spare anytime soon, and the -40°F to +250°F range covers everything

Hannah ★★★★★

These 90 durometer 309 o-rings seal perfectly on my hydraulic fittings with no leaks. The temperature range down to -40°F gives me confidence for winter use.