Mutual Screw & Supply

0.21" CS X 5.975" ID Buna-N Nitrile O-Rings | AS568-355 | Dash 355 | 70 Durometer | Black (50 / Pkg.)

0.21" CS X 5.975" ID Buna-N Nitrile O-Rings | AS568-355 | Dash 355 | 70 - Main image
$36.23 $56.61 In stock

Buna-N Nitrile o-rings in AS568-355, 5.975" 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: 355
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 5.975" (151.76 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 50 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)

Thomas ★★★★★

These 70 durometer o-rings fit my application perfectly; the 5.975" ID is exactly right and they feel durable. No issues with the seal after a few days of use with hot water.

Richard F. ★★★★★

Finally, an o-ring that actually seals my hydraulic reservoir without fighting me to get it seated. The 70 durometer is firm enough to hold its shape but still has some give when I stretch it over the flange, and the -40°F rating is a bonus since my shop isn't heated. These are my go-to for any 6-in

Ryan Z. ★★★★★

The cross-section thickness on these is spot on, creating a snug seal for my hydraulic cylinder rebuild. With 50 in the bag, I have plenty of spares for future projects. Much better than the cheaper kits I've tried before.