Mutual Screw & Supply

0.139" CS X 1.421" ID Buna-N Nitrile O-Rings | AS568-221 | Dash 221 | 70 Durometer | Black (500 / Pkg.)

0.139" CS X 1.421" ID Buna-N Nitrile O-Rings | AS568-221 | Dash 221 | 70 - Main image
$42.53 $59.07 In stock

Buna-N Nitrile o-rings in AS568-221, 1.421" 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: 221
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 1.421" (36.09 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • 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 (4.0 / 5 · 5 reviews)

Isabella E. ★★★★★

Same day I got them I fixed a hydraulic leak on an old log splitter—these Buna-N rings handled the pressure like nothing. The bag of 500 will probably last me a lifetime.

Sofia ★★★★★

The 0.139" cross-section on these AS568-221 o-rings fit perfectly into the groove I was replacing, and having 500 in a pack means I won’t run out for a while. They feel pliable yet firm enough to hold up in my hydraulic application.

Alexander U. ★★★★☆

The 70 durometer feels just right for the hydraulic fittings I’m sealing—firm enough to hold pressure but not too stiff to install. Only gave four stars because a few rings in the bag had slight flash on the inner edge, but a quick trim fixed that.