Mutual Screw & Supply

0.139" CS X 1.359" ID Buna-N Nitrile O-Rings | AS568-220 | Dash 220 | Square Profile | 70 Durometer (250 / Pkg.)

0.139" CS X 1.359" ID Buna-N Nitrile O-Rings | AS568-220 | Dash 220 | Square - Main image
$40.09 $57.27 In stock

Buna-N Nitrile o-rings in AS568-220, 1.359" 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 (Square Profile)
  • Material: Buna-N Nitrile
  • AS568 dash size: 220
  • Cross-section: 0.139" (3.53 mm)
  • Inner diameter: 1.359" (34.52 mm)
  • Durometer: 70 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 250 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)

Charlotte ★★★★★

Used these for a hydraulic repair job I've been putting off; the 70 durometer feels just right for a snug seal without being too hard to install. The square profile seated perfectly in the groove, and the price for 250 was hard to beat compared to what the local shop wanted.

Julian D. ★★★★★

Finally found a source for these square-profile o-rings that doesn't require buying a case of 1000. The 70 durometer feels like the right balance for my hydraulic fittings, and the $0.20 per ring beats the hardware store pricing. Handled a 200°F oil leak test on the first try.

Grace H. ★★★★★

These AS568-220 square-profile o-rings fit perfectly into my pneumatic cylinder groove. The 70 durometer buna-n material feels sturdy and the 1.359" inner diameter was exactly what I needed for a leak-free seal. My system runs at about 180°F, so the temperature range gives me good peace of mind.