Mutual Screw & Supply

0.21" CS X 0.474" ID Buna-N Nitrile O-Rings | AS568-310 | Dash 310 | 70 Durometer | Black (400 / Pkg.)

0.21" CS X 0.474" ID Buna-N Nitrile O-Rings | AS568-310 | Dash 310 | 70 - Main image
$34.05 $50.07 In stock

Buna-N Nitrile o-rings in AS568-310, 0.474" 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: 310
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 0.474" (12.04 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 400 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 (4.0 / 5 · 5 reviews)

Christopher ★★★★★

The 70 durometer feels just right for the pneumatic cylinders I rebuilt—not too stiff, not too soft. These 310-sized rings seated perfectly in the grooves and haven't leaked a drop after a week of cycling. For the price per pack, you're getting a solid value for industrial repairs.

Joshua S. ★★★★★

Installed these on a few hydraulic fittings and the 70 durometer held up well under constant pressure. The 400-count package means I’ve got plenty left for future repairs without ordering again.

Christopher J. ★★★★☆

The inner diameter on these AS568-310 rings measured exactly on spec with my calipers. They worked fine for sealing a hydraulic fitting on my tractor, though a few in the bag had slight flash lines I had to trim.