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Backups

Back-ups

Back-up rings are installed together with o-rings or other accompanying seals to prevent gap extrusion in sealing applications. They are available in a spiral, split, or solid design.

Seals/Backup Rings 
Viewing Page 1 of 272 (3,255 results)
574-224
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.

  • Excellent extrusion resistance
  • Easily stretched for installation
  • Lubrication is enhanced by rubber which absorbs system
    fluid and does not plate out on rubbing surfaces
$0.78
/EA
Add to Cart
574-228
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.

  • Excellent extrusion resistance
  • Easily stretched for installation
  • Lubrication is enhanced by rubber which absorbs system
    fluid and does not plate out on rubbing surfaces
$1.05
/EA
Add to Cart
574-334
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.

  • Excellent extrusion resistance
  • Easily stretched for installation
  • Lubrication is enhanced by rubber which absorbs system
    fluid and does not plate out on rubbing surfaces
$1.50
/EA
Add to Cart
574-231
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.

  • Excellent extrusion resistance
  • Easily stretched for installation
  • Lubrication is enhanced by rubber which absorbs system
    fluid and does not plate out on rubbing surfaces
$1.21
/EA
Add to Cart
573-346
IN STOCK

Hytrel backup ring with a flat cross-section.

Excellent extrusion resistance and tolerance to fluids such as phosphate esters, hydraulic oil, and water.

  • Improved extrusion resistance compared to standard FKM or NBR backups
  • Can be stretched over larger diameters and will return quickly to their original size
$2.58
/EA
Add to Cart
574-330
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.

  • Excellent extrusion resistance
  • Easily stretched for installation
  • Lubrication is enhanced by rubber which absorbs system
    fluid and does not plate out on rubbing surfaces
$1.34
/EA
Add to Cart
574-218
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.

  • Excellent extrusion resistance
  • Easily stretched for installation
  • Lubrication is enhanced by rubber which absorbs system
    fluid and does not plate out on rubbing surfaces
$0.55
/EA
Add to Cart
5 1/8 X 5 1/2 Back-up SOLID PTFE - 575-354T | CRC Distribution Inc.
575-354T
IN STOCK

5 1/8 X 5 1/2 Back-up SOLID PTFE

$15.69
/EA
Add to Cart
574-346
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.

  • Excellent extrusion resistance
  • Easily stretched for installation
  • Lubrication is enhanced by rubber which absorbs system
    fluid and does not plate out on rubbing surfaces
$2.68
/EA
Add to Cart
574-328
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.

  • Excellent extrusion resistance
  • Easily stretched for installation
  • Lubrication is enhanced by rubber which absorbs system
    fluid and does not plate out on rubbing surfaces
$1.11
/EA
Add to Cart
575-425T
IN STOCK

4 1/2 X 5 Back-up SOLID PTFE

$18.36
/EA
Add to Cart
575-237
IN STOCK

Solid Urethane backup ring with a flat cross-section.

$1.74
/EA
Add to Cart
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