Mutual Screw & Supply

0.21" CS X 1.975" ID Buna-N Nitrile O-Rings | AS568-329 | Dash 329 | 50 Durometer (55 / Pkg.)

0.21" CS X 1.975" ID Buna-N Nitrile O-Rings | AS568-329 | Dash 329 | 50 - Main image
$33.5 $54.92 In stock

Buna-N Nitrile o-rings in AS568-329, 1.975" 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: 329
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 1.975" (50.16 mm)
  • Durometer: 50 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 55 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)

Owen F. ★★★★★

I needed a seal that would hold up under some heat cycling, and these 50-durometer rings have a nice pliable feel that really conforms to the groove. The inner diameter of 1.975 inches is a perfect fit for my application, and the pack of 55 is enough to keep spares handy.

Ella B. ★★★★★

The cross-section on these o-rings is exactly 0.21 inches as specified, which fit perfectly into the groove I needed them for. I've been running them in a hydraulic application around 180°F and they show no signs of swelling or hardening after a few weeks of use.

Abigail A. ★★★★★

I needed a 50-durometer seal that could handle both heat and cold, and these buna-n rings hold up perfectly from -40°F up to 250°F without losing their shape. The 0.21" cross-section gives a nice snug fit in the groove I machined.