Mutual Screw & Supply

0.21" CS X 1.162" ID Buna-N Nitrile O-Rings | AS568-321 | Dash 321 | 70 Durometer | Black (300 / Pkg.)

0.21" CS X 1.162" ID Buna-N Nitrile O-Rings | AS568-321 | Dash 321 | 70 - Main image
$35.87 $58.81 In stock

Buna-N Nitrile o-rings in AS568-321, 1.162" 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: 321
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 1.162" (29.51 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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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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)

Ruby I. ★★★★★

Had to replace the worn seals in a pneumatic cylinder and these fit the groove perfectly on the first try. The 70 durometer feels firm but not brittle, and the -40°F rating gives me confidence for the cold storage line. No leaks after a week of cycling.

Matthew ★★★★★

Exactly the right size for my hydraulic rebuild—the 1.162" ID seated perfectly in the groove with no slop, and the 70 durometer gives them a solid, firm feel that should handle the 250°F service range without worry.

Robert N. ★★★★★

Pulling these out of the package, the 70 durometer rubber feels dense and durable, not flimsy like some cheaper o-rings I've used. They seated snugly in my hydraulic fitting without any twisting, and the black finish looks clean. I ordered the 300-pack for a long-term project, and at this price per