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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-368
Backup Contoured NBR90 BS368 - 7.750 X 8.125 X 0.060"
21
BUN-368 - Backup Contoured NBR90 BS368 - 7.750 X 8.125 X 0.060"
Product Information
Product CodeBUN-368
DescriptionBackup Contoured NBR90 BS368 - 7.750 X 8.125 X 0.060"
ProfileBUN
Internal Diameter7.750
Outer Diameter8.125
Seal Height0.060
Max. Temp C110
Alt. Part No.R80368
BUN-444
Backup Contoured NBR90 BS444 - 7.750 X 8.250 X 0.096" 67059244 75172298 N8-90-444 OLD CODE 197.46 X
174
BUN-444 - Backup Contoured NBR90 BS444 - 7.750 X 8.250 X 0.096" 67059244 75172298 N8-90-444 OLD CODE 197.46 X
Product Information
Product CodeBUN-444
DescriptionBackup Contoured NBR90 BS444 - 7.750 X 8.250 X 0.096" 67059244 75172298 N8-90-444 OLD CODE 197.46 X
ProfileBUN
Internal Diameter7.750
Outer Diameter8.250
Seal Height0.096
Max. Temp C110
Alt. Part No.R80444
BUN-171
Backup Contoured NBR90 BS171 - 8.000 X 8.188 X 0.045"
0
BUN-171 - Backup Contoured NBR90 BS171 - 8.000 X 8.188 X 0.045"
Product Information
Product CodeBUN-171
DescriptionBackup Contoured NBR90 BS171 - 8.000 X 8.188 X 0.045"
ProfileBUN
Internal Diameter8.000
Outer Diameter8.188
Seal Height0.045
Max. Temp C110
Alt. Part No.R80171
BUN-266
Backup Contoured NBR90 BS266 - 8.000 X 8.250 X 0.040"
51
BUN-266 - Backup Contoured NBR90 BS266 - 8.000 X 8.250 X 0.040"
Product Information
Product CodeBUN-266
DescriptionBackup Contoured NBR90 BS266 - 8.000 X 8.250 X 0.040"
ProfileBUN
Internal Diameter8.000
Outer Diameter8.250
Seal Height0.040
Max. Temp C110
Alt. Part No.R80266
BUN-369
Backup Contoured NBR90 BS369 - 8.000 X 8.375 X 0.060" R80369 67059198
89
BUN-369 - Backup Contoured NBR90 BS369 - 8.000 X 8.375 X 0.060" R80369 67059198
Product Information
Product CodeBUN-369
DescriptionBackup Contoured NBR90 BS369 - 8.000 X 8.375 X 0.060" R80369 67059198
ProfileBUN
Internal Diameter8.000
Outer Diameter8.375
Seal Height0.060
Max. Temp C110
Alt. Part No.R80369
BUN-445
Backup Contoured NBR90 BS445 - 8.000 X 8.500 X 0.096"
8
BUN-445 - Backup Contoured NBR90 BS445 - 8.000 X 8.500 X 0.096"
Product Information
Product CodeBUN-445
DescriptionBackup Contoured NBR90 BS445 - 8.000 X 8.500 X 0.096"
ProfileBUN
Internal Diameter8.000
Outer Diameter8.500
Seal Height0.096
Max. Temp C110
Alt. Part No.R80445
BUN-172
Backup Contoured NBR90 BS172 - 8.250 X 8.438 X 0.045"
63
BUN-172 - Backup Contoured NBR90 BS172 - 8.250 X 8.438 X 0.045"
Product Information
Product CodeBUN-172
DescriptionBackup Contoured NBR90 BS172 - 8.250 X 8.438 X 0.045"
ProfileBUN
Internal Diameter8.250
Outer Diameter8.438
Seal Height0.045
Max. Temp C110
Alt. Part No.R80172
BUN-267
Backup Contoured NBR90 BS267 - 8.250 X 8.500 X 0.040"
0
BUN-267 - Backup Contoured NBR90 BS267 - 8.250 X 8.500 X 0.040"
Product Information
Product CodeBUN-267
DescriptionBackup Contoured NBR90 BS267 - 8.250 X 8.500 X 0.040"
ProfileBUN
Internal Diameter8.250
Outer Diameter8.500
Seal Height0.040
Max. Temp C110
Alt. Part No.R80267
BUN-370
Backup Contoured NBR90 BS370 - 8.250 X 8.625 X 0.060"
87
BUN-370 - Backup Contoured NBR90 BS370 - 8.250 X 8.625 X 0.060"
Product Information
Product CodeBUN-370
DescriptionBackup Contoured NBR90 BS370 - 8.250 X 8.625 X 0.060"
ProfileBUN
Internal Diameter8.250
Outer Diameter8.625
Seal Height0.060
Max. Temp C110
Alt. Part No.R80370
BUN-173
Backup Contoured NBR90 BS173 - 8.500 X 8.688 X 0.045"
-
Enquire
BUN-173 - Backup Contoured NBR90 BS173 - 8.500 X 8.688 X 0.045"
Product Information
Product CodeBUN-173
DescriptionBackup Contoured NBR90 BS173 - 8.500 X 8.688 X 0.045"
ProfileBUN
Internal Diameter8.500
Outer Diameter8.688
Seal Height0.045
Max. Temp C110
Alt. Part No.R80173
BUN-268
Backup Contoured NBR90 BS268 - 8.500 X 8.750 X 0.040"
0
BUN-268 - Backup Contoured NBR90 BS268 - 8.500 X 8.750 X 0.040"
Product Information
Product CodeBUN-268
DescriptionBackup Contoured NBR90 BS268 - 8.500 X 8.750 X 0.040"
ProfileBUN
Internal Diameter8.500
Outer Diameter8.750
Seal Height0.040
Max. Temp C110
Alt. Part No.R80268
BUN-371
Backup Contoured NBR90 BS371 - 8.500 X 8.875 X 0.060"
89
BUN-371 - Backup Contoured NBR90 BS371 - 8.500 X 8.875 X 0.060"
Product Information
Product CodeBUN-371
DescriptionBackup Contoured NBR90 BS371 - 8.500 X 8.875 X 0.060"
ProfileBUN
Internal Diameter8.500
Outer Diameter8.875
Seal Height0.060
Max. Temp C110
Alt. Part No.R80371
BUN-446
Backup Contoured NBR90 BS446 - 8.500 X 9.000 X 0.096"
124
BUN-446 - Backup Contoured NBR90 BS446 - 8.500 X 9.000 X 0.096"
Product Information
Product CodeBUN-446
DescriptionBackup Contoured NBR90 BS446 - 8.500 X 9.000 X 0.096"
ProfileBUN
Internal Diameter8.500
Outer Diameter9.000
Seal Height0.096
Max. Temp C110
Alt. Part No.R80446
BUN-174
Backup Contoured NBR90 BS174 - 8.750 X 8.938 X 0.045"
-
Enquire
BUN-174 - Backup Contoured NBR90 BS174 - 8.750 X 8.938 X 0.045"
Product Information
Product CodeBUN-174
DescriptionBackup Contoured NBR90 BS174 - 8.750 X 8.938 X 0.045"
ProfileBUN
Internal Diameter8.750
Outer Diameter8.938
Seal Height0.045
Max. Temp C110
Alt. Part No.R80174
BUN-269
Backup Contoured NBR90 BS269 - 8.750 X 9.000 X 0.040"
89
BUN-269 - Backup Contoured NBR90 BS269 - 8.750 X 9.000 X 0.040"
Product Information
Product CodeBUN-269
DescriptionBackup Contoured NBR90 BS269 - 8.750 X 9.000 X 0.040"
ProfileBUN
Internal Diameter8.750
Outer Diameter9.000
Seal Height0.040
Max. Temp C110
Alt. Part No.R80269
BUN-372
Backup Contoured NBR90 BS372 - 8.750 X 9.125 X 0.060"
50
BUN-372 - Backup Contoured NBR90 BS372 - 8.750 X 9.125 X 0.060"
Product Information
Product CodeBUN-372
DescriptionBackup Contoured NBR90 BS372 - 8.750 X 9.125 X 0.060"
ProfileBUN
Internal Diameter8.750
Outer Diameter9.125
Seal Height0.060
Max. Temp C110
Alt. Part No.R80372
BUN-175
Backup Contoured NBR90 BS175 - 9.000 X 9.188 X 0.045"
0
BUN-175 - Backup Contoured NBR90 BS175 - 9.000 X 9.188 X 0.045"
Product Information
Product CodeBUN-175
DescriptionBackup Contoured NBR90 BS175 - 9.000 X 9.188 X 0.045"
ProfileBUN
Internal Diameter9.000
Outer Diameter9.188
Seal Height0.045
Max. Temp C110
Alt. Part No.R80175
BUN-270
Backup Contoured NBR90 BS270 - 9.000 X 9.250 X 0.040"
0
BUN-270 - Backup Contoured NBR90 BS270 - 9.000 X 9.250 X 0.040"
Product Information
Product CodeBUN-270
DescriptionBackup Contoured NBR90 BS270 - 9.000 X 9.250 X 0.040"
ProfileBUN
Internal Diameter9.000
Outer Diameter9.250
Seal Height0.040
Max. Temp C110
Alt. Part No.R80270
BUN-373
Backup Contoured NBR90 BS373 - 9.000 X 9.375 X 0.060"
50
BUN-373 - Backup Contoured NBR90 BS373 - 9.000 X 9.375 X 0.060"
Product Information
Product CodeBUN-373
DescriptionBackup Contoured NBR90 BS373 - 9.000 X 9.375 X 0.060"
ProfileBUN
Internal Diameter9.000
Outer Diameter9.375
Seal Height0.060
Max. Temp C110
Alt. Part No.R80373
BUN-447
Backup Contoured NBR90 BS447 - 9.000 X 9.500 X 0.096"
19
BUN-447 - Backup Contoured NBR90 BS447 - 9.000 X 9.500 X 0.096"
Product Information
Product CodeBUN-447
DescriptionBackup Contoured NBR90 BS447 - 9.000 X 9.500 X 0.096"
ProfileBUN
Internal Diameter9.000
Outer Diameter9.500
Seal Height0.096
Max. Temp C110
Alt. Part No.R80447
BUN-176
Backup Contoured NBR90 BS176 - 9.250 X 9.438 X 0.045"
0
BUN-176 - Backup Contoured NBR90 BS176 - 9.250 X 9.438 X 0.045"
Product Information
Product CodeBUN-176
DescriptionBackup Contoured NBR90 BS176 - 9.250 X 9.438 X 0.045"
ProfileBUN
Internal Diameter9.250
Outer Diameter9.438
Seal Height0.045
Max. Temp C110
Alt. Part No.R80176
BUN-271
Backup Contoured NBR90 BS271 - 9.250 X 9.500 X 0.040"
0
BUN-271 - Backup Contoured NBR90 BS271 - 9.250 X 9.500 X 0.040"
Product Information
Product CodeBUN-271
DescriptionBackup Contoured NBR90 BS271 - 9.250 X 9.500 X 0.040"
ProfileBUN
Internal Diameter9.250
Outer Diameter9.500
Seal Height0.040
Max. Temp C110
Alt. Part No.R80271
BUN-374
Backup Contoured NBR90 BS374 - 9.250 X 9.625 X 0.060"
0
BUN-374 - Backup Contoured NBR90 BS374 - 9.250 X 9.625 X 0.060"
Product Information
Product CodeBUN-374
DescriptionBackup Contoured NBR90 BS374 - 9.250 X 9.625 X 0.060"
ProfileBUN
Internal Diameter9.250
Outer Diameter9.625
Seal Height0.060
Max. Temp C110
Alt. Part No.R80374
BUN-177
Backup Contoured NBR90 BS177 - 9.500 X 9.688 X 0.045"
0
BUN-177 - Backup Contoured NBR90 BS177 - 9.500 X 9.688 X 0.045"
Product Information
Product CodeBUN-177
DescriptionBackup Contoured NBR90 BS177 - 9.500 X 9.688 X 0.045"
ProfileBUN
Internal Diameter9.500
Outer Diameter9.688
Seal Height0.045
Max. Temp C110
Alt. Part No.R80177
 
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