Mutual Screw & Supply

0.21" CS X 0.662" ID Buna-N Nitrile O-Rings | AS568-313 | Dash 313 | 90 Durometer (400 / Pkg.)

0.21" CS X 0.662" ID Buna-N Nitrile O-Rings | AS568-313 | Dash 313 | 90 - Main image
$41.87 $57.35 In stock

Buna-N Nitrile o-rings in AS568-313, 0.662" 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: 313
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 0.662" (16.81 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 400 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)

Ella ★★★★★

I've been using these o-rings to rebuild a few pneumatic cylinders, and the 90 durometer material holds up much better against abrasion than the standard 70 stuff I used before. The inner diameter of 0.662" fit perfectly on the piston grooves without any stretching or distortion.

Eva S. ★★★★★

Had to replace a handful of seals on a hydraulic line that kept weeping, and the 0.662" inner diameter fit perfectly. The 90-durometer rubber feels noticeably firmer than the standard 70 stuff I've used before, so I'm hoping these hold up better under pressure.

Joseph Y. ★★★★★

The 90 durometer rating on these o-rings gives them a reassuring firmness for high-pressure applications. I used a pack to rebuild a pneumatic cylinder, and the seal held perfectly through multiple cycles. Very consistent sizing across all 400 pieces.