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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 
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-559870
Call for Availability*

BU-TFE-40×1.5×5-C/S

$11.19
/EA
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-615126
Call for Availability*

BU-90NBR-1.5×1/8-C/S(10)

$0.58
/EA
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-615128
Call for Availability*

BU-90NBR-1.75×1/8-C/S(10)

$0.68
/EA
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-615146
Call for Availability*

BU-90NBR-4×1/8-C/S(5)

$2.22
/EA
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-615152
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BU-90NBR-4.75×1/8-C/S(5)

$2.49
/EA
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-615217
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BU-90NBR-5.25×1/4-C/S(1)

$4.26
/EA
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-637565
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BU-NYL-2-1/2×0.25×0.07

$7.13
/EA
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-638223
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BU-NYL-4×0.25×0.07

$7.87
/EA
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-638224
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BU-NYL-4×0.07-C/S

$7.87
/EA
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Cascade Backup Ring | CRC Distribution Inc.
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Cascade Backup Ring

CAS-638225
Call for Availability*

BU-NYL-5×0.075-C/S

$7.94
/EA
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