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Seals/Backup Rings 
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-0556891000 Caterpillar Backup Ring

CTC-0556891000
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BACK-UP RING (1)

$10.59
/EA
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-9J0707 Caterpillar Backup Ring

CTC-9J0707
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BACK-UP RING (5)

$2.55
/EA
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-0964275 Caterpillar Backup Ring

CTC-0964275
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BACK-UP RING

$8.11
/EA
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-1057393 Caterpillar Backup Ring

CTC-1057393
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BACK-UP RING (1)

$10.89
/EA
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-1183123 Caterpillar Backup Ring

CTC-1183123
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BACK-UP RING (1)

$18.71
/EA
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-1183129 Caterpillar Backup Ring

CTC-1183129
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BACK-UP RING (1)

$5.96
/EA
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-1183130 Caterpillar Backup Ring

CTC-1183130
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BACK-UP RING (9)

$0.78
/EA
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-1211595 Caterpillar Backup Ring

CTC-1211595
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BACK-UP RING (1)

$40.41
/EA
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-1211603 Caterpillar Backup Ring

CTC-1211603
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BACK-UP RING (1)

$33.67
/EA
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Caterpillar Backup Ring | CRC Distribution Inc.
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CTC-1357934 Caterpillar Backup Ring

CTC-1357934
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BACK-UP RING (1)

$22.79
/EA
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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.