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BUN
Design
    • Contoured back-up rings provide a comfortable fit when paired with an oring.
    • Provides good extrusion resistance to a paired oring to increase pressure handling capabilities.
Material
    • 70A Nitrile - Precision Moulded
    • Most economical solution to enhance oring capability.
Application
    • Suitable for static and dynamic applications.
Fluids
    • Hydraulic fluids, petroleum fuels and oils

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Product Code
Description
Availability
Qty
BUN-320
Backup Contoured NBR90 BS320 - 1.125 X 1.500 X 0.060"
3,891
BUN-320 - Backup Contoured NBR90 BS320 - 1.125 X 1.500 X 0.060"
Product Information
Product CodeBUN-320
DescriptionBackup Contoured NBR90 BS320 - 1.125 X 1.500 X 0.060"
ProfileBUN
Internal Diameter1.125
Outer Diameter1.500
Seal Height0.060
Max. Temp C110
Alt. Part No.R80320
BUN-123
Backup Contoured NBR90 BS123 - 1.187 X 1.375 X 0.045"
2,242
BUN-123 - Backup Contoured NBR90 BS123 - 1.187 X 1.375 X 0.045"
Product Information
Product CodeBUN-123
DescriptionBackup Contoured NBR90 BS123 - 1.187 X 1.375 X 0.045"
ProfileBUN
Internal Diameter1.187
Outer Diameter1.375
Seal Height0.045
Max. Temp C110
Alt. Part No.R80123
BUN-217
Backup Contoured NBR90 BS217 - 1.187 X 1.437 X 0.040" 750171970 N8-90-217 OLD CODE 30.55 X 36.55 X 1
545
BUN-217 - Backup Contoured NBR90 BS217 - 1.187 X 1.437 X 0.040" 750171970 N8-90-217 OLD CODE 30.55 X 36.55 X 1
Product Information
Product CodeBUN-217
DescriptionBackup Contoured NBR90 BS217 - 1.187 X 1.437 X 0.040" 750171970 N8-90-217 OLD CODE 30.55 X 36.55 X 1
ProfileBUN
Internal Diameter1.187
Outer Diameter1.437
Seal Height0.040
Max. Temp C110
Alt. Part No.R80217
BUN-321
Backup Contoured NBR90 BS321 - 1.187 X 1.562 X 0.060"
229
BUN-321 - Backup Contoured NBR90 BS321 - 1.187 X 1.562 X 0.060"
Product Information
Product CodeBUN-321
DescriptionBackup Contoured NBR90 BS321 - 1.187 X 1.562 X 0.060"
ProfileBUN
Internal Diameter1.187
Outer Diameter1.562
Seal Height0.060
Max. Temp C110
Alt. Part No.R80321
BUN-025
Backup Contoured NBR90 BS025 - 1.188 X 1.313 X 0.045"
493
BUN-025 - Backup Contoured NBR90 BS025 - 1.188 X 1.313 X 0.045"
Product Information
Product CodeBUN-025
DescriptionBackup Contoured NBR90 BS025 - 1.188 X 1.313 X 0.045"
ProfileBUN
Internal Diameter1.188
Outer Diameter1.313
Seal Height0.045
Max. Temp C110
Alt. Part No.R80025
BUN-026
Backup Contoured NBR90 BS026 - 1.250 X 1.375 X 0.045"
679
BUN-026 - Backup Contoured NBR90 BS026 - 1.250 X 1.375 X 0.045"
Product Information
Product CodeBUN-026
DescriptionBackup Contoured NBR90 BS026 - 1.250 X 1.375 X 0.045"
ProfileBUN
Internal Diameter1.250
Outer Diameter1.375
Seal Height0.045
Max. Temp C110
Alt. Part No.R80026
BUN-124
Backup Contoured NBR90 BS124 - 1.250 X 1.438 X 0.045"
18
BUN-124 - Backup Contoured NBR90 BS124 - 1.250 X 1.438 X 0.045"
Product Information
Product CodeBUN-124
DescriptionBackup Contoured NBR90 BS124 - 1.250 X 1.438 X 0.045"
ProfileBUN
Internal Diameter1.250
Outer Diameter1.438
Seal Height0.045
Max. Temp C110
Alt. Part No.R80124
BUN-218
Backup Contoured NBR90 BS218 - 1.250 X 1.500 X 0.040" 75171972 67059071 N8-90-218 OLD CODE
296
BUN-218 - Backup Contoured NBR90 BS218 - 1.250 X 1.500 X 0.040" 75171972 67059071 N8-90-218 OLD CODE
Product Information
Product CodeBUN-218
DescriptionBackup Contoured NBR90 BS218 - 1.250 X 1.500 X 0.040" 75171972 67059071 N8-90-218 OLD CODE
ProfileBUN
Internal Diameter1.250
Outer Diameter1.500
Seal Height0.040
Max. Temp C110
Alt. Part No.R80218
BUN-322
Backup Contoured NBR90 BS322 - 1.250 X 1.625 X 0.060"
234
BUN-322 - Backup Contoured NBR90 BS322 - 1.250 X 1.625 X 0.060"
Product Information
Product CodeBUN-322
DescriptionBackup Contoured NBR90 BS322 - 1.250 X 1.625 X 0.060"
ProfileBUN
Internal Diameter1.250
Outer Diameter1.625
Seal Height0.060
Max. Temp C110
Alt. Part No.R80322
BUN-027
Backup Contoured NBR90 BS027 - 1.312 X 1.437 X 0.045"
4,778
BUN-027 - Backup Contoured NBR90 BS027 - 1.312 X 1.437 X 0.045"
Product Information
Product CodeBUN-027
DescriptionBackup Contoured NBR90 BS027 - 1.312 X 1.437 X 0.045"
ProfileBUN
Internal Diameter1.312
Outer Diameter1.437
Seal Height0.045
Max. Temp C110
Alt. Part No.R80027
BUN-125
Backup Contoured NBR90 BS125 - 1.312 X 1.500 X 0.045"
971
BUN-125 - Backup Contoured NBR90 BS125 - 1.312 X 1.500 X 0.045"
Product Information
Product CodeBUN-125
DescriptionBackup Contoured NBR90 BS125 - 1.312 X 1.500 X 0.045"
ProfileBUN
Internal Diameter1.312
Outer Diameter1.500
Seal Height0.045
Max. Temp C110
Alt. Part No.R80125
BUN-219
Backup Contoured NBR90 BS219 - 1.312 X 1.562 X 0.040"
3,736
BUN-219 - Backup Contoured NBR90 BS219 - 1.312 X 1.562 X 0.040"
Product Information
Product CodeBUN-219
DescriptionBackup Contoured NBR90 BS219 - 1.312 X 1.562 X 0.040"
ProfileBUN
Internal Diameter1.312
Outer Diameter1.562
Seal Height0.040
Max. Temp C110
Alt. Part No.R80219
BUN-323
Backup Contoured NBR90 BS323 - 1.312 X 1.687 X 0.060" 75172127
152
BUN-323 - Backup Contoured NBR90 BS323 - 1.312 X 1.687 X 0.060" 75172127
Product Information
Product CodeBUN-323
DescriptionBackup Contoured NBR90 BS323 - 1.312 X 1.687 X 0.060" 75172127
ProfileBUN
Internal Diameter1.312
Outer Diameter1.687
Seal Height0.060
Max. Temp C110
Alt. Part No.R80323
BUN-028
Backup Contoured NBR90 BS028 - 1.375 X 1.500 X 0.045"
200
BUN-028 - Backup Contoured NBR90 BS028 - 1.375 X 1.500 X 0.045"
Product Information
Product CodeBUN-028
DescriptionBackup Contoured NBR90 BS028 - 1.375 X 1.500 X 0.045"
ProfileBUN
Internal Diameter1.375
Outer Diameter1.500
Seal Height0.045
Max. Temp C110
Alt. Part No.R80028
BUN-126
Backup Contoured NBR90 BS126 - 1.375 X 1.563 X 0.045"
806
BUN-126 - Backup Contoured NBR90 BS126 - 1.375 X 1.563 X 0.045"
Product Information
Product CodeBUN-126
DescriptionBackup Contoured NBR90 BS126 - 1.375 X 1.563 X 0.045"
ProfileBUN
Internal Diameter1.375
Outer Diameter1.563
Seal Height0.045
Max. Temp C110
Alt. Part No.R80126
BUN-220
Backup Contoured NBR90 BS220 - 1.375 X 1.625 X 0.040"
5,347
BUN-220 - Backup Contoured NBR90 BS220 - 1.375 X 1.625 X 0.040"
Product Information
Product CodeBUN-220
DescriptionBackup Contoured NBR90 BS220 - 1.375 X 1.625 X 0.040"
ProfileBUN
Internal Diameter1.375
Outer Diameter1.625
Seal Height0.040
Max. Temp C110
Alt. Part No.R80220
BUN-324
Backup Contoured NBR90 BS324 - 1.375 X 1.750 X 0.060"
2,032
BUN-324 - Backup Contoured NBR90 BS324 - 1.375 X 1.750 X 0.060"
Product Information
Product CodeBUN-324
DescriptionBackup Contoured NBR90 BS324 - 1.375 X 1.750 X 0.060"
ProfileBUN
Internal Diameter1.375
Outer Diameter1.750
Seal Height0.060
Max. Temp C110
Alt. Part No.R80324
BUN-127
Backup Contoured NBR90 BS127 - 1.437 X 1.625 X 0.045"
662
BUN-127 - Backup Contoured NBR90 BS127 - 1.437 X 1.625 X 0.045"
Product Information
Product CodeBUN-127
DescriptionBackup Contoured NBR90 BS127 - 1.437 X 1.625 X 0.045"
ProfileBUN
Internal Diameter1.437
Outer Diameter1.625
Seal Height0.045
Max. Temp C110
Alt. Part No.R80127
BUN-221
Backup Contoured NBR90 BS221 - 1.437 X 1.687 X 0.040"
458
BUN-221 - Backup Contoured NBR90 BS221 - 1.437 X 1.687 X 0.040"
Product Information
Product CodeBUN-221
DescriptionBackup Contoured NBR90 BS221 - 1.437 X 1.687 X 0.040"
ProfileBUN
Internal Diameter1.437
Outer Diameter1.687
Seal Height0.040
Max. Temp C110
Alt. Part No.R80221
BUN-029
Backup Contoured NBR90 BS029 - 1.500 X 1.625 X 0.045"
1,044
BUN-029 - Backup Contoured NBR90 BS029 - 1.500 X 1.625 X 0.045"
Product Information
Product CodeBUN-029
DescriptionBackup Contoured NBR90 BS029 - 1.500 X 1.625 X 0.045"
ProfileBUN
Internal Diameter1.500
Outer Diameter1.625
Seal Height0.045
Max. Temp C110
Alt. Part No.R80029
BUN-128
Backup Contoured NBR90 BS128 - 1.500 X 1.688 X 0.045"
2,870
BUN-128 - Backup Contoured NBR90 BS128 - 1.500 X 1.688 X 0.045"
Product Information
Product CodeBUN-128
DescriptionBackup Contoured NBR90 BS128 - 1.500 X 1.688 X 0.045"
ProfileBUN
Internal Diameter1.500
Outer Diameter1.688
Seal Height0.045
Max. Temp C110
Alt. Part No.R80128
BUN-222
Backup Contoured NBR90 BS222 - 1.500 X 1.750 X 0.040"
7
BUN-222 - Backup Contoured NBR90 BS222 - 1.500 X 1.750 X 0.040"
Product Information
Product CodeBUN-222
DescriptionBackup Contoured NBR90 BS222 - 1.500 X 1.750 X 0.040"
ProfileBUN
Internal Diameter1.500
Outer Diameter1.750
Seal Height0.040
Max. Temp C110
Alt. Part No.R80222
BUN-325
Backup Contoured NBR90 BS325 - 1.500 X 1.875 X 0.060"
580
BUN-325 - Backup Contoured NBR90 BS325 - 1.500 X 1.875 X 0.060"
Product Information
Product CodeBUN-325
DescriptionBackup Contoured NBR90 BS325 - 1.500 X 1.875 X 0.060"
ProfileBUN
Internal Diameter1.500
Outer Diameter1.875
Seal Height0.060
Max. Temp C110
Alt. Part No.R80325
BUN-129
Backup Contoured NBR90 BS129 - 1.562 X 1.750 X 0.045"
119
BUN-129 - Backup Contoured NBR90 BS129 - 1.562 X 1.750 X 0.045"
Product Information
Product CodeBUN-129
DescriptionBackup Contoured NBR90 BS129 - 1.562 X 1.750 X 0.045"
ProfileBUN
Internal Diameter1.562
Outer Diameter1.750
Seal Height0.045
Max. Temp C110
Alt. Part No.R80129
 
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