Mutual Screw & Supply

0.139" CS X 0.421" ID Buna-N Nitrile O-Rings | AS568-205 | Dash 205 | 90 Durometer (800 / Pkg.)

0.139" CS X 0.421" ID Buna-N Nitrile O-Rings | AS568-205 | Dash 205 | 90 - Main image
$39.36 $52.48 In stock

Buna-N Nitrile o-rings in AS568-205, 0.421" inner diameter by 0.139" 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: 205
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 0.421" (10.69 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 800 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 (4.8 / 5 · 5 reviews)

Michael ★★★★★

I needed a bulk pack of o-rings for a hydraulic fitting repair, and these 90-durometer Buna-N seals fit perfectly. The 0.421" ID matched my application exactly, and the rubber feels durable yet still flexible enough to seat easily. Great value for 800 pieces.

Eli O. ★★★★★

These 90-durometer o-rings are perfect for my air line fittings that see high pressure; the size spec is spot-on and the pack of 800 will last me years. Really solid seal with no leaks, exactly what I needed for a couple of tricky connectors.

Samuel J. ★★★★★

Picked up a pack of these for a hydraulic repair job, and the 90-durometer rating is noticeably stiffer than the standard stuff I've used before, which is perfect for higher-pressure seals. They fit the groove snugly and didn't deform after a few cycles. Happy with the quantity for the price.