Mutual Screw & Supply

0.21" CS X 0.599" ID Buna-N Nitrile O-Rings | AS568-312 | Dash 312 | 90 Durometer (400 / Pkg.)

0.21" CS X 0.599" ID Buna-N Nitrile O-Rings | AS568-312 | Dash 312 | 90 - Main image
$37.51 $50.69 In stock

Buna-N Nitrile o-rings in AS568-312, 0.599" 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: 312
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 0.599" (15.21 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +250°F (-40°C to +121°C)
  • Measurement type: Imperial
  • Pack quantity: 400 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 (4.8 / 5 · 5 reviews)

Christopher V. ★★★★★

I needed a bulk pack of dash 312 rings for a pneumatic manifold rebuild, and these being 90 durometer with a 0.21" cross section fit the spec exactly. The whole box came well-sealed, and the rubber feels noticeably firmer than the old ones I pulled off, so I'm confident they'll hold up in the -40°F

Lucy ★★★★★

The 90 durometer on these o-rings gives a firm seal that holds up well under pressure. My previous pack of standard 70 durometer rings wore out faster, so this upgrade should last much longer.

Daniel C. ★★★★★

I needed a bulk supply of these for a rebuild project and the 90 durometer hardness is exactly what I was after—they seat firmly without squishing out. The -40°F to +250°F range covers everything I run them through, and 400 per package means I won't be reordering anytime soon.