Mutual Screw & Supply

0.139" CS X 2.609" ID Buna-N Nitrile O-Rings | AS568-231 | Dash 231 | 50 Durometer (80 / Pkg.)

0.139" CS X 2.609" ID Buna-N Nitrile O-Rings | AS568-231 | Dash 231 | 50 - Main image
$31.97 $50.74 In stock

Buna-N Nitrile o-rings in AS568-231, 2.609" 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: 231
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 2.609" (66.27 mm)
  • Durometer: 50 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 80 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 (4.2 / 5 · 5 reviews)

Robert ★★★★★

Needed a fresh batch of these for a hydraulic cylinder rebuild, and the 50 durometer hardness hits the sweet spot for a good seal without being too stiff. Fit perfectly into the groove, and the -40° temp range gives me peace of mind for outdoor equipment.

William I. ★★★★★

I was a bit skeptical about the size, but these o-rings fit perfectly on the hydraulic cylinder I was rebuilding. The 50 durometer rubber feels just right—not too hard, not too soft.

Richard M. ★★★★☆

Needed to rebuild a seal on an old pneumatic cylinder. The 50 durometer hardness gives them enough give to seat without squishing out, and they’re working fine so far. Only gripe is the packaging could use a sturdier bag, but the o-rings themselves are solid.