Mutual Screw & Supply

0.21" CS X 13.975" ID Buna-N Nitrile O-Rings | AS568-381 | Dash 381 | 70 Durometer | Black (20 / Pkg.)

0.21" CS X 13.975" ID Buna-N Nitrile O-Rings | AS568-381 | Dash 381 | 70 - Main image
$37.23 $53.19 In stock

Buna-N Nitrile o-rings in AS568-381, 13.975" 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: 381
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 13.975" (354.96 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 20 per package
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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 (4.4 / 5 · 5 reviews)

Ava ★★★★★

The 0.21" cross-section fits perfectly in my pneumatic cylinder groove, and the 70 durometer feels just right. These seals have held up well through multiple pressure cycles without any leaks.

Timothy U. ★★★★★

Measured the inner diameter with calipers and it's exactly 13.975" as advertised, so the fit on my valve cover was perfect. The 70 durometer feels just right for a snug seal without being too hard to work into the groove.

Avery P. ★★★★★

I needed a large o-ring for a hydraulic cylinder repair, and the 13.975-inch inner diameter was an exact match for the groove. The rubber feels dense and flexible at room temp, which gives me confidence it'll seal well at the rated 250°F.