Mutual Screw & Supply

0.21" CS X 2.975" ID Buna-N Nitrile O-Rings | AS568-337 | Dash 337 | 90 Durometer (100 / Pkg.)

0.21" CS X 2.975" ID Buna-N Nitrile O-Rings | AS568-337 | Dash 337 | 90 - Main image
$37.24 $53.2 In stock

Buna-N Nitrile o-rings in AS568-337, 2.975" inner diameter by 0.21" 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: 337
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 2.975" (75.56 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 100 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 (4.4 / 5 · 5 reviews)

Sofia ★★★★★

Finally had to swap out the old seals on a pump flange at work, and these fit perfectly right out of the bag. The 90 durometer feels noticeably stiffer than the 70s I’ve used, so I trust them to hold up in the heat range they promise. Pack of 100 means I’m set for the next several rebuilds.

Ava ★★★★★

I needed a pack of 337s for a hydraulic repair and these fit perfectly — the 90 durometer gave me the firm seal I was after. The 2.975" inner diameter matched my groove dimensions exactly, no guessing. Glad I grabbed the 100-pack, plenty to spare for future jobs.

Thomas A. ★★★★★

I was worried about getting a consistent seal on my hydraulic fittings, but these 337s measure exactly to spec and the 90 durometer feels plenty stiff for high-pressure lines. Installed a full set this weekend and they seated perfectly without any twisting.