Mutual Screw & Supply

0.139" CS X 5.984" ID Buna-N Nitrile O-Rings | AS568-258 | Dash 258 | 70 Durometer | Black (80 / Pkg.)

0.139" CS X 5.984" ID Buna-N Nitrile O-Rings | AS568-258 | Dash 258 | 70 - Main image
$35.18 $56.74 In stock

Buna-N Nitrile o-rings in AS568-258, 5.984" 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: 258
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.984" (151.99 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 80 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)

Timothy ★★★★★

These fit perfectly on my water pump shaft, and the 70 durometer feels just right for a snug seal. I've had no leaks since installing them.

Matthew ★★★★★

I replaced a worn seal on a hydraulic cylinder with these, and the 70 durometer compound held up perfectly under pressure. The temperature range covers my needs easily.

Claire ★★★★★

The cross-section on these is spot on; they seated perfectly in my pneumatic actuator groove without any tweaking. Came packaged well with 80 pieces, so I've got plenty of spares for future jobs.