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Curved Backup Ring - NBR

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574-245 | BU-90NBR-4.375x1/8-C/S(5) | CRC Distribution Inc.
574-245 | BU-90NBR-4.375x1/8-C/S(5) | CRC Distribution Inc.
574-245 | BU-90NBR-4.375x1/8-C/S(5) | CRC Distribution Inc.
574-245 | BU-90NBR-4.375x1/8-C/S(5) | CRC Distribution Inc.
SKU: 574-245

574-245 90A Buna-N Rubber Backup Ring | 4 3/8 in ID 1/8 in CS

20 EA IN STOCK*

Parback® backup ring with a curved cross-section.

Parbaks are contoured on one face to minimize distortion of the o-ring when under pressure. Parbaks should be installed with the contoured face against the o-ring, but reversal does no harm.

$2.57 / EA
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90A Durometer | Buna-N Rubber Material | 4 3/8 in Nominal Inner Diameter | 1/8 in Cross Section | Backup Ring

Features

  • Excellent extrusion resistance
  • Easily stretched for installation
  • Lubrication is enhanced by rubber which absorbs system fluid and does not plate out on rubbing surfaces

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Item Specifications

  • 1/8 Inch
  • 90A
  • Parker
  • NBR
  • Buna-N Rubber
  • 240 °F
  • -40 °F
  • 0.05 Inch
  • 4 3/8 Inch
  • 4 5/8 Inch
  • Varies According to Diametral Clearance
  • 15 Years
  • 574
  • -40° to +240°F
  • 0.04 Inch
  • ±0.003
  • inch
  • 0.00 lbs per EA