Mutual Screw & Supply

0.21" CS X 16.975" ID Buna-N Nitrile O-Rings | AS568-387 | Dash 387 | 70 Durometer | Black (15 / Pkg.)

0.21" CS X 16.975" ID Buna-N Nitrile O-Rings | AS568-387 | Dash 387 | 70 - Main image
$44.24 $59.79 In stock

Buna-N Nitrile o-rings in AS568-387, 16.975" 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: 387
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 16.975" (431.17 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 15 per package
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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 (5.0 / 5 · 5 reviews)

Grace P. ★★★★★

Used a pair of these to seal a water tank fitting on my truck—the 70 durometer rubber compressed perfectly without any leaks. The 16.975" inner diameter fit snugly right out of the pack.

Grace ★★★★★

I replaced a worn gasket in a hydraulic press with these Buna-N o-rings and the fit on the 16.975" ID was spot-on. The 70 durometer seems firm enough to seal under pressure without being too stiff. So far no leaks and they've handled the operating temperature range easily.

Avery ★★★★★

The 0.21" cross-section gives these a nice chunky feel, and they seated evenly on my pump housing without any twisting. I've used them in a hot oil application around 200°F and they haven't shown any signs of swelling or hardening yet.