Mutual Screw & Supply

0.139" CS X 5.859" ID Buna-N Nitrile O-Rings | AS568-257 | Dash 257 | Metal Detectable | 70 Durometer (13 / Pkg.)

0.139" CS X 5.859" ID Buna-N Nitrile O-Rings | AS568-257 | Dash 257 | Metal - Main image
$31.96 $53.27 In stock

Buna-N Nitrile o-rings in AS568-257, 5.859" 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: 257
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 5.859" (148.82 mm)
  • Durometer: 70 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Metal detectable: Yes
  • Pack quantity: 13 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 (4.8 / 5 · 5 reviews)

Hannah ★★★★★

The metal detectable feature gives me real peace of mind in our food processing line, and these 70 durometer rings fit perfectly on the larger flanges. I've been running them at about 180°F with no issues so far.

Jacob L. ★★★★★

I bought these for a high-temp pneumatic application and the nitrile material holds up perfectly at 250°F without any softening. The metal-detectable feature is a nice bonus for food processing safety checks.

Joseph R. ★★★★★

The metal-detectable feature gives me real peace of mind in my food processing equipment, and these 70-durometer rings fit the groove perfectly without any distortion. They snugged right into place on the first try, sealing a stubborn air line joint that had been weeping for months.