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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-272
Backup Contoured NBR90 BS272 - 9.500 X 9.750 X 0.040"
114
BUN-272 - Backup Contoured NBR90 BS272 - 9.500 X 9.750 X 0.040"
Product Information
Product CodeBUN-272
DescriptionBackup Contoured NBR90 BS272 - 9.500 X 9.750 X 0.040"
ProfileBUN
Internal Diameter9.500
Outer Diameter9.750
Seal Height0.040
Max. Temp C110
Alt. Part No.R80272
BUN-375
Backup Contoured NBR90 BS375 - 9.500 X 9.875 X 0.060"
104
BUN-375 - Backup Contoured NBR90 BS375 - 9.500 X 9.875 X 0.060"
Product Information
Product CodeBUN-375
DescriptionBackup Contoured NBR90 BS375 - 9.500 X 9.875 X 0.060"
ProfileBUN
Internal Diameter9.500
Outer Diameter9.875
Seal Height0.060
Max. Temp C110
Alt. Part No.R80375
BUN-448
Backup Contoured NBR90 BS448 - 9.500 X 10.000 X 0.096" 75172304 67059248 241.91 X 2.44mm N8-90-448 O
1
BUN-448 - Backup Contoured NBR90 BS448 - 9.500 X 10.000 X 0.096" 75172304 67059248 241.91 X 2.44mm N8-90-448 O
Product Information
Product CodeBUN-448
DescriptionBackup Contoured NBR90 BS448 - 9.500 X 10.000 X 0.096" 75172304 67059248 241.91 X 2.44mm N8-90-448 O
ProfileBUN
Internal Diameter9.500
Outer Diameter10.000
Seal Height0.096
Max. Temp C110
Alt. Part No.R80448
BUN-178
Backup Contoured NBR90 BS178 - 9.750 X 9.938 X 0.045"
0
BUN-178 - Backup Contoured NBR90 BS178 - 9.750 X 9.938 X 0.045"
Product Information
Product CodeBUN-178
DescriptionBackup Contoured NBR90 BS178 - 9.750 X 9.938 X 0.045"
ProfileBUN
Internal Diameter9.750
Outer Diameter9.938
Seal Height0.045
Max. Temp C110
Alt. Part No.R80178
BUN-273
Backup Contoured NBR90 BS273 - 9.750 X 10.000 X 0.040"
148
BUN-273 - Backup Contoured NBR90 BS273 - 9.750 X 10.000 X 0.040"
Product Information
Product CodeBUN-273
DescriptionBackup Contoured NBR90 BS273 - 9.750 X 10.000 X 0.040"
ProfileBUN
Internal Diameter9.750
Outer Diameter10.000
Seal Height0.040
Max. Temp C110
Alt. Part No.R80273
BUN-376
Backup Contoured NBR90 BS376 - 9.750 X 10.125 X 0.060"
0
BUN-376 - Backup Contoured NBR90 BS376 - 9.750 X 10.125 X 0.060"
Product Information
Product CodeBUN-376
DescriptionBackup Contoured NBR90 BS376 - 9.750 X 10.125 X 0.060"
ProfileBUN
Internal Diameter9.750
Outer Diameter10.125
Seal Height0.060
Max. Temp C110
Alt. Part No.R80376
BUN-274
Backup Contoured NBR90 BS274 - 10.000 X 10.250 X 0.040"
206
BUN-274 - Backup Contoured NBR90 BS274 - 10.000 X 10.250 X 0.040"
Product Information
Product CodeBUN-274
DescriptionBackup Contoured NBR90 BS274 - 10.000 X 10.250 X 0.040"
ProfileBUN
Internal Diameter10.000
Outer Diameter10.250
Seal Height0.040
Max. Temp C110
Alt. Part No.R80274
BUN-377
Backup Contoured NBR90 BS377 - 10.000 X 10.375 X 0.060"
21
BUN-377 - Backup Contoured NBR90 BS377 - 10.000 X 10.375 X 0.060"
Product Information
Product CodeBUN-377
DescriptionBackup Contoured NBR90 BS377 - 10.000 X 10.375 X 0.060"
ProfileBUN
Internal Diameter10.000
Outer Diameter10.375
Seal Height0.060
Max. Temp C110
Alt. Part No.R80377
BUN-449
Backup Contoured NBR90 BS449 - 10.000 X 10.500 X 0.096"
5
BUN-449 - Backup Contoured NBR90 BS449 - 10.000 X 10.500 X 0.096"
Product Information
Product CodeBUN-449
DescriptionBackup Contoured NBR90 BS449 - 10.000 X 10.500 X 0.096"
ProfileBUN
Internal Diameter10.000
Outer Diameter10.500
Seal Height0.096
Max. Temp C110
Alt. Part No.R80449
BUN-275
Backup Contoured NBR90 BS275 - 10.500 X 10.750 X 0.040"
185
BUN-275 - Backup Contoured NBR90 BS275 - 10.500 X 10.750 X 0.040"
Product Information
Product CodeBUN-275
DescriptionBackup Contoured NBR90 BS275 - 10.500 X 10.750 X 0.040"
ProfileBUN
Internal Diameter10.500
Outer Diameter10.750
Seal Height0.040
Max. Temp C110
Alt. Part No.R80275
BUN-378
Backup Contoured NBR90 BS378 - 10.500 X 10.875 X 0.060"
0
BUN-378 - Backup Contoured NBR90 BS378 - 10.500 X 10.875 X 0.060"
Product Information
Product CodeBUN-378
DescriptionBackup Contoured NBR90 BS378 - 10.500 X 10.875 X 0.060"
ProfileBUN
Internal Diameter10.500
Outer Diameter10.875
Seal Height0.060
Max. Temp C110
Alt. Part No.R80378
BUN-450
Backup Contoured NBR90 BS450 - 10.500 X 11.000 X 0.096"
90
BUN-450 - Backup Contoured NBR90 BS450 - 10.500 X 11.000 X 0.096"
Product Information
Product CodeBUN-450
DescriptionBackup Contoured NBR90 BS450 - 10.500 X 11.000 X 0.096"
ProfileBUN
Internal Diameter10.500
Outer Diameter11.000
Seal Height0.096
Max. Temp C110
Alt. Part No.R80450
BUN-276
Backup Contoured NBR90 BS276 - 11.000 X 11.250 X 0.040"
-
Enquire
BUN-276 - Backup Contoured NBR90 BS276 - 11.000 X 11.250 X 0.040"
Product Information
Product CodeBUN-276
DescriptionBackup Contoured NBR90 BS276 - 11.000 X 11.250 X 0.040"
ProfileBUN
Internal Diameter11.000
Outer Diameter11.250
Seal Height0.040
Max. Temp C110
Alt. Part No.R80276
BUN-379
Backup Contoured NBR90 BS379 - 11.000 X 11.375 X 0.060"
160
BUN-379 - Backup Contoured NBR90 BS379 - 11.000 X 11.375 X 0.060"
Product Information
Product CodeBUN-379
DescriptionBackup Contoured NBR90 BS379 - 11.000 X 11.375 X 0.060"
ProfileBUN
Internal Diameter11.000
Outer Diameter11.375
Seal Height0.060
Max. Temp C110
Alt. Part No.R80379
BUN-451
Backup Contoured NBR90 BS451 - 11.000 X 11.500 X 0.096"
14
BUN-451 - Backup Contoured NBR90 BS451 - 11.000 X 11.500 X 0.096"
Product Information
Product CodeBUN-451
DescriptionBackup Contoured NBR90 BS451 - 11.000 X 11.500 X 0.096"
ProfileBUN
Internal Diameter11.000
Outer Diameter11.500
Seal Height0.096
Max. Temp C110
Alt. Part No.R80451
BUN-277
Backup Contoured NBR90 BS277 - 11.500 X 11.750 X 0.040"
285
BUN-277 - Backup Contoured NBR90 BS277 - 11.500 X 11.750 X 0.040"
Product Information
Product CodeBUN-277
DescriptionBackup Contoured NBR90 BS277 - 11.500 X 11.750 X 0.040"
ProfileBUN
Internal Diameter11.500
Outer Diameter11.750
Seal Height0.040
Max. Temp C110
Alt. Part No.R80277
BUN-380
Backup Contoured NBR90 BS380 - 11.500 X 11.875 X 0.060"
0
BUN-380 - Backup Contoured NBR90 BS380 - 11.500 X 11.875 X 0.060"
Product Information
Product CodeBUN-380
DescriptionBackup Contoured NBR90 BS380 - 11.500 X 11.875 X 0.060"
ProfileBUN
Internal Diameter11.500
Outer Diameter11.875
Seal Height0.060
Max. Temp C110
Alt. Part No.R80380
BUN-452
Backup Contoured NBR90 BS452 - 11.500 X 12.000 X 0.096"
4
BUN-452 - Backup Contoured NBR90 BS452 - 11.500 X 12.000 X 0.096"
Product Information
Product CodeBUN-452
DescriptionBackup Contoured NBR90 BS452 - 11.500 X 12.000 X 0.096"
ProfileBUN
Internal Diameter11.500
Outer Diameter12.000
Seal Height0.096
Max. Temp C110
Alt. Part No.R80452
BUN-452A
Backup Contoured NBR90 BS452A - 11.725 X 12.250 X 0.096"
-
Enquire
BUN-452A - Backup Contoured NBR90 BS452A - 11.725 X 12.250 X 0.096"
Product Information
Product CodeBUN-452A
DescriptionBackup Contoured NBR90 BS452A - 11.725 X 12.250 X 0.096"
ProfileBUN
Internal Diameter11.725
Outer Diameter12.250
Seal Height0.096
Max. Temp C110
Alt. Part No.R8052A
BUN-278
Backup Contoured NBR90 BS278 - 12.000 X 12.250 X 0.040"
178
BUN-278 - Backup Contoured NBR90 BS278 - 12.000 X 12.250 X 0.040"
Product Information
Product CodeBUN-278
DescriptionBackup Contoured NBR90 BS278 - 12.000 X 12.250 X 0.040"
ProfileBUN
Internal Diameter12.000
Outer Diameter12.250
Seal Height0.040
Max. Temp C110
Alt. Part No.R80278
BUN-381
Backup Contoured NBR90 BS381 - 12.000 X 12.375 X 0.060"
0
BUN-381 - Backup Contoured NBR90 BS381 - 12.000 X 12.375 X 0.060"
Product Information
Product CodeBUN-381
DescriptionBackup Contoured NBR90 BS381 - 12.000 X 12.375 X 0.060"
ProfileBUN
Internal Diameter12.000
Outer Diameter12.375
Seal Height0.060
Max. Temp C110
Alt. Part No.R80381
BUN-453
Backup Contoured NBR90 BS453 - 12.000 X 12.500 X 0.096"
0
BUN-453 - Backup Contoured NBR90 BS453 - 12.000 X 12.500 X 0.096"
Product Information
Product CodeBUN-453
DescriptionBackup Contoured NBR90 BS453 - 12.000 X 12.500 X 0.096"
ProfileBUN
Internal Diameter12.000
Outer Diameter12.500
Seal Height0.096
Max. Temp C110
Alt. Part No.R80453
BUN-454
Backup Contoured NBR90 BS454 - 12.500 X 13.000 X 0.096"
0
BUN-454 - Backup Contoured NBR90 BS454 - 12.500 X 13.000 X 0.096"
Product Information
Product CodeBUN-454
DescriptionBackup Contoured NBR90 BS454 - 12.500 X 13.000 X 0.096"
ProfileBUN
Internal Diameter12.500
Outer Diameter13.000
Seal Height0.096
Max. Temp C110
Alt. Part No.R80454
BUN-279
Backup Contoured NBR90 BS279 - 13.000 X 13.250 X 0.040"
0
BUN-279 - Backup Contoured NBR90 BS279 - 13.000 X 13.250 X 0.040"
Product Information
Product CodeBUN-279
DescriptionBackup Contoured NBR90 BS279 - 13.000 X 13.250 X 0.040"
ProfileBUN
Internal Diameter13.000
Outer Diameter13.250
Seal Height0.040
Max. Temp C110
Alt. Part No.R80279
 
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