Mutual Screw & Supply

0.21" CS X 0.974" ID Buna-N Nitrile O-Rings | AS568-318 | Dash 318 | 70 Durometer | Black (300 / Pkg.)

0.21" CS X 0.974" ID Buna-N Nitrile O-Rings | AS568-318 | Dash 318 | 70 - Main image
$34.27 $52.72 In stock

Buna-N Nitrile o-rings in AS568-318, 0.974" 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: 318
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 0.974" (24.74 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 300 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 (4.4 / 5 · 5 reviews)

Leo Q. ★★★★★

Finally found a source for these odd-sized seals that didn't break the bank. The 0.21" cross-section is noticeably beefier than some cheaper alternatives I've tried. Packed neatly and the 70 durometer feels just right for my application.

Alexander G. ★★★★★

The 0.974" inner diameter is spot on for my hydraulic fittings, and the buna-N seals perfectly against the groove without any distortion. I've run them through a full 200°F cycle and they've held their shape with zero leaks so far.

Henry H. ★★★★☆

These o-rings fit perfectly on a hydraulic cylinder I was rebuilding, and the 70 durometer feels like the right balance of firmness and flexibility. I've only lost one so far out of the 300, which is good for the price.