Mutual Screw & Supply

0.21" CS X 1.287" ID HNBR O-Rings | AS568-323 | Dash 323 | 90 Durometer (20 / Pkg.)

0.21" CS X 1.287" ID HNBR O-Rings | AS568-323 | Dash 323 | 90 Durometer (20 / - Main image
$34.84 $56.2 In stock

HNBR o-rings in AS568-323, 1.287" inner diameter by 0.21" cross-section. Service range -40°F to +300°F (-40°C to +149°C). Also known as HSN, Highly Saturated Nitrile.

Specifications

  • Product type: O-Ring
  • Material: HNBR
  • AS568 dash size: 323
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 1.287" (32.69 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 20 per package
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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 (4.2 / 5 · 5 reviews)

Ellie ★★★★★

The 90 durometer hardness is exactly what I needed for a high-pressure application, and the HNBR material handles the heat without softening. These came well-packed in a 20-count bag, and the sizing is spot-on for the groove I measured.

Claire ★★★★★

These are the first 323s I've found that actually keep their shape at high temps, and the 90 durometer hardness is perfect for my pump rebuilds. The pack of 20 is a solid value, and the -40°F to 300°F range covers everything I need around the shop.

Penelope D. ★★★★☆

These fit perfectly in the hydraulic valve I was rebuilding, and the 90 durometer feels noticeably stiffer than standard Buna rings. The 300°F rating gives me confidence in hot oil service. Only wish they came in a larger quantity for the price.