Mutual Screw & Supply

0.21" CS X 4.1" ID Buna-N Nitrile O-Rings | AS568-346 | Dash 346 | 70 Durometer | Black (100 / Pkg.)

0.21" CS X 4.1" ID Buna-N Nitrile O-Rings | AS568-346 | Dash 346 | 70 Durometer - Main image
$42.18 $60.26 In stock

Buna-N Nitrile o-rings in AS568-346, 4.1" 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: 346
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 4.1" (104.14 mm)
  • Durometer: 70 Shore A
  • Color: Black
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 100 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 (5.0 / 5 · 5 reviews)

Daniel O. ★★★★★

The 0.21" cross-section fits perfectly into the groove I machined, and the 70 durometer feels like it'll hold up well under moderate pressure. Used these to rebuild an old hydraulic cylinder, and they seated without any leaks on the first test.

Samuel P. ★★★★★

Was a bit worried about getting the right fit, but the 4.1" inner diameter was spot on for my hydraulic setup. They have a nice, firm durometer rating that doesn't feel too stiff when I'm wrenching them into place. The 100-pack will keep me covered for a good while.

Aurora C. ★★★★★

I needed a replacement for some old pneumatic seals, and these 4.1" ID o-rings dropped right in with no fuss. The material feels supple but tough, and they've held up fine through a few hot cycles already.