Mutual Screw & Supply

0.21" CS X 4.725" ID HNBR O-Rings | AS568-350 | Dash 350 | 90 Durometer (5 / Pkg.)

0.21" CS X 4.725" ID HNBR O-Rings | AS568-350 | Dash 350 | 90 Durometer (5 / - Main image
$39.65 $53.58 In stock

HNBR o-rings in AS568-350, 4.725" 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: 350
  • Cross-section: 0.21" (5.33 mm)
  • Inner diameter: 4.725" (120.01 mm)
  • Durometer: 90 Shore A
  • Temperature range: -40°F to +300°F (-40°C to +149°C)
  • Measurement type: Imperial
  • Pack quantity: 5 per package
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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)

Robert T. ★★★★★

The 90 durometer on these HNBR rings is exactly what I needed for a hydraulic fitting that sees constant heat, and they seated perfectly without any deformation. The -40 to 300°F range gives me real confidence in a demanding environment.

Aurora ★★★★★

I needed a tough o-ring for a high-temp hydraulic line, and these HNBR ones handle 300°F no problem. The 0.21" cross-section made for a snug fit in the groove, and the five-pack gave me spares.

Penelope W. ★★★★★

The 90 durometer hardness gives these HNBR rings a firm feel that handled my compressor fitting without squishing out of place, and the -40°F rating is a bonus for my outdoor setup. Fit the 4.725" bore perfectly on the first try.