Mutual Screw & Supply

Buna-N Nitrile O-Rings | AS568-178 | Dash 178 | 70 Durometer | Black (75 / Pkg.)

Buna-N Nitrile O-Rings | AS568-178 | Dash 178 | 70 Durometer | Black (75 / Pkg.) - Main image
$44.19 $62.24 In stock

Buna-N Nitrile o-rings in AS568-178. 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: 178
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 75 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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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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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)

Charlotte I. ★★★★★

Used these for a hydraulic repair on a log splitter and they handled the pressure perfectly. The 70 durometer is firm enough to seal but not too hard to install.

Daniel ★★★★★

I needed a fresh set of o-rings for a hydraulic cylinder rebuild, and these 70 durometer Buna-N ones seated perfectly in the grooves, the material feeling just right. They've held up well through temperature cycles from cold mornings to hot afternoons without any cracking or leaks.

Hazel V. ★★★★★

Got the AS568-178 pack for a compressor rebuild and they seated nicely in the grooves without rolling or pinching. The 70 durometer feels firm but flexible enough to get a tight seal, and I appreciate that they handle temps up to 250°F since my setup runs warm.