Mutual Screw & Supply

0.21" CS X 9.975" ID Buna-N Nitrile O-Rings | AS568-371 | Dash 371 | 70 Durometer | Black (30 / Pkg.)

0.21" CS X 9.975" ID Buna-N Nitrile O-Rings | AS568-371 | Dash 371 | 70 - Main image
$31.91 $53.18 In stock

Buna-N Nitrile o-rings in AS568-371, 9.975" 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: 371
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 9.975" (253.36 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 30 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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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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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)

Avery ★★★★★

These o-rings fit perfectly on my hydraulic cylinder rebuild—the 70 durometer feels just right for the pressure I’m putting on it. Installed easily and sealed immediately without any leaks during testing.

Jacob N. ★★★★★

Received these today for a pump rebuild on an old air compressor. The 70 durometer feels just right for the pressure seal, and they slipped into the groove without any struggle.

Samuel E. ★★★★★

These o-rings fit my hydraulic cylinder perfectly, the 70 durometer is firm but seals well. Nice to have a 30-pack for a project that needed a few extras.