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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-232
Backup Contoured NBR90 BS232 - 2.750 X 3.000 X 0.040" R80232 75172012 67059085 N8-90-232 OLD CODE 70
671
BUN-232 - Backup Contoured NBR90 BS232 - 2.750 X 3.000 X 0.040" R80232 75172012 67059085 N8-90-232 OLD CODE 70
Product Information
Product CodeBUN-232
DescriptionBackup Contoured NBR90 BS232 - 2.750 X 3.000 X 0.040" R80232 75172012 67059085 N8-90-232 OLD CODE 70
ProfileBUN
Internal Diameter2.750
Outer Diameter3.000
Seal Height0.040
Max. Temp C110
Alt. Part No.R80232
BUN-335
Backup Contoured NBR90 BS335 - 2.750 X 3.125 X 0.060" 67059164 75172152 70.31 X 4.65 X 1.52mm N8-90-
665
BUN-335 - Backup Contoured NBR90 BS335 - 2.750 X 3.125 X 0.060" 67059164 75172152 70.31 X 4.65 X 1.52mm N8-90-
Product Information
Product CodeBUN-335
DescriptionBackup Contoured NBR90 BS335 - 2.750 X 3.125 X 0.060" 67059164 75172152 70.31 X 4.65 X 1.52mm N8-90-
ProfileBUN
Internal Diameter2.750
Outer Diameter3.125
Seal Height0.060
Max. Temp C110
Alt. Part No.R80335
BUN-149
Backup Contoured NBR90 BS149 - 2.812 X 3.000 X 0.045" 67059024 75171906 N8-90-149 OLD CODE 71.91 X
319
BUN-149 - Backup Contoured NBR90 BS149 - 2.812 X 3.000 X 0.045" 67059024 75171906 N8-90-149 OLD CODE 71.91 X
Product Information
Product CodeBUN-149
DescriptionBackup Contoured NBR90 BS149 - 2.812 X 3.000 X 0.045" 67059024 75171906 N8-90-149 OLD CODE 71.91 X
ProfileBUN
Internal Diameter2.812
Outer Diameter3.000
Seal Height0.045
Max. Temp C110
Alt. Part No.R80149
BUN-040
Backup Contoured NBR90 BS040 - 2.875 X 3.000 X 0.045"
0
BUN-040 - Backup Contoured NBR90 BS040 - 2.875 X 3.000 X 0.045"
Product Information
Product CodeBUN-040
DescriptionBackup Contoured NBR90 BS040 - 2.875 X 3.000 X 0.045"
ProfileBUN
Internal Diameter2.875
Outer Diameter3.000
Seal Height0.045
Max. Temp C110
Alt. Part No.R80040
BUN-150
Backup Contoured NBR90 BS150 - 2.875 X 3.063 X 0.045"
50
BUN-150 - Backup Contoured NBR90 BS150 - 2.875 X 3.063 X 0.045"
Product Information
Product CodeBUN-150
DescriptionBackup Contoured NBR90 BS150 - 2.875 X 3.063 X 0.045"
ProfileBUN
Internal Diameter2.875
Outer Diameter3.063
Seal Height0.045
Max. Temp C110
Alt. Part No.R80150
BUN-233
Backup Contoured NBR90 BS233 - 2.875 X 3.125 X 0.040"
79
BUN-233 - Backup Contoured NBR90 BS233 - 2.875 X 3.125 X 0.040"
Product Information
Product CodeBUN-233
DescriptionBackup Contoured NBR90 BS233 - 2.875 X 3.125 X 0.040"
ProfileBUN
Internal Diameter2.875
Outer Diameter3.125
Seal Height0.040
Max. Temp C110
Alt. Part No.R80233
BUN-336
Backup Contoured NBR90 BS336 - 2.875 X 3.250 X 0.060"
276
BUN-336 - Backup Contoured NBR90 BS336 - 2.875 X 3.250 X 0.060"
Product Information
Product CodeBUN-336
DescriptionBackup Contoured NBR90 BS336 - 2.875 X 3.250 X 0.060"
ProfileBUN
Internal Diameter2.875
Outer Diameter3.250
Seal Height0.060
Max. Temp C110
Alt. Part No.R80336
BUN-041
Backup Contoured NBR90 BS041 - 3.000 X 3.125 X 0.045"
12
BUN-041 - Backup Contoured NBR90 BS041 - 3.000 X 3.125 X 0.045"
Product Information
Product CodeBUN-041
DescriptionBackup Contoured NBR90 BS041 - 3.000 X 3.125 X 0.045"
ProfileBUN
Internal Diameter3.000
Outer Diameter3.125
Seal Height0.045
Max. Temp C110
Alt. Part No.R80041
BUN-151
Backup Contoured NBR90 BS151 - 3.000 X 3.188 X 0.045"
627
BUN-151 - Backup Contoured NBR90 BS151 - 3.000 X 3.188 X 0.045"
Product Information
Product CodeBUN-151
DescriptionBackup Contoured NBR90 BS151 - 3.000 X 3.188 X 0.045"
ProfileBUN
Internal Diameter3.000
Outer Diameter3.188
Seal Height0.045
Max. Temp C110
Alt. Part No.R80151
BUN-234
Backup Contoured NBR90 BS234 - 3.000 X 3.250 X 0.040" 67059087
111
BUN-234 - Backup Contoured NBR90 BS234 - 3.000 X 3.250 X 0.040" 67059087
Product Information
Product CodeBUN-234
DescriptionBackup Contoured NBR90 BS234 - 3.000 X 3.250 X 0.040" 67059087
ProfileBUN
Internal Diameter3.000
Outer Diameter3.250
Seal Height0.040
Max. Temp C110
Alt. Part No.R80234
BUN-337
Backup Contoured NBR90 BS337 - 3.000 X 3.375 X 0.060" R80337 67059166
66
BUN-337 - Backup Contoured NBR90 BS337 - 3.000 X 3.375 X 0.060" R80337 67059166
Product Information
Product CodeBUN-337
DescriptionBackup Contoured NBR90 BS337 - 3.000 X 3.375 X 0.060" R80337 67059166
ProfileBUN
Internal Diameter3.000
Outer Diameter3.375
Seal Height0.060
Max. Temp C110
Alt. Part No.R80337
BUN-235
Backup Contoured NBR90 BS235 - 3.125 X 3.375 X 0.040"
255
BUN-235 - Backup Contoured NBR90 BS235 - 3.125 X 3.375 X 0.040"
Product Information
Product CodeBUN-235
DescriptionBackup Contoured NBR90 BS235 - 3.125 X 3.375 X 0.040"
ProfileBUN
Internal Diameter3.125
Outer Diameter3.375
Seal Height0.040
Max. Temp C110
Alt. Part No.R80235
BUN-338
Backup Contoured NBR90 BS338 - 3.125 X 3.500 X 0.060" 75172159 67059167 N8-90-338 OLD CODE 79.83 X
225
BUN-338 - Backup Contoured NBR90 BS338 - 3.125 X 3.500 X 0.060" 75172159 67059167 N8-90-338 OLD CODE 79.83 X
Product Information
Product CodeBUN-338
DescriptionBackup Contoured NBR90 BS338 - 3.125 X 3.500 X 0.060" 75172159 67059167 N8-90-338 OLD CODE 79.83 X
ProfileBUN
Internal Diameter3.125
Outer Diameter3.500
Seal Height0.060
Max. Temp C110
Alt. Part No.R80338
BUN-042
Backup Contoured NBR90 BS042 - 3.250 X 3.375 X 0.045"
73
BUN-042 - Backup Contoured NBR90 BS042 - 3.250 X 3.375 X 0.045"
Product Information
Product CodeBUN-042
DescriptionBackup Contoured NBR90 BS042 - 3.250 X 3.375 X 0.045"
ProfileBUN
Internal Diameter3.250
Outer Diameter3.375
Seal Height0.045
Max. Temp C110
Alt. Part No.R80042
BUN-152
Backup Contoured NBR90 BS152 - 3.250 X 3.438 X 0.045" 67059027 75171910 83.01 X 1.14mm N8-90-152 OLD
231
BUN-152 - Backup Contoured NBR90 BS152 - 3.250 X 3.438 X 0.045" 67059027 75171910 83.01 X 1.14mm N8-90-152 OLD
Product Information
Product CodeBUN-152
DescriptionBackup Contoured NBR90 BS152 - 3.250 X 3.438 X 0.045" 67059027 75171910 83.01 X 1.14mm N8-90-152 OLD
ProfileBUN
Internal Diameter3.250
Outer Diameter3.438
Seal Height0.045
Max. Temp C110
Alt. Part No.R80152
BUN-236
Backup Contoured NBR90 BS236 - 3.250 X 3.500 X 0.040" 75172024 67059089 N8-90-236 OLD CODE 82.70 X
304
BUN-236 - Backup Contoured NBR90 BS236 - 3.250 X 3.500 X 0.040" 75172024 67059089 N8-90-236 OLD CODE 82.70 X
Product Information
Product CodeBUN-236
DescriptionBackup Contoured NBR90 BS236 - 3.250 X 3.500 X 0.040" 75172024 67059089 N8-90-236 OLD CODE 82.70 X
ProfileBUN
Internal Diameter3.250
Outer Diameter3.500
Seal Height0.040
Max. Temp C110
Alt. Part No.R80236
BUN-339
Backup Contoured NBR90 BS339 - 3.250 X 3.625 X 0.060"
421
BUN-339 - Backup Contoured NBR90 BS339 - 3.250 X 3.625 X 0.060"
Product Information
Product CodeBUN-339
DescriptionBackup Contoured NBR90 BS339 - 3.250 X 3.625 X 0.060"
ProfileBUN
Internal Diameter3.250
Outer Diameter3.625
Seal Height0.060
Max. Temp C110
Alt. Part No.R80339
BUN-237
Backup Contoured NBR90 BS237 - 3.375 X 3.625 X 0.040"
104
BUN-237 - Backup Contoured NBR90 BS237 - 3.375 X 3.625 X 0.040"
Product Information
Product CodeBUN-237
DescriptionBackup Contoured NBR90 BS237 - 3.375 X 3.625 X 0.040"
ProfileBUN
Internal Diameter3.375
Outer Diameter3.625
Seal Height0.040
Max. Temp C110
Alt. Part No.R80237
BUN-340
Backup Contoured NBR90 BS340 - 3.375 X 3.750 X 0.060" 67059169 75172166 86.31 X 4.65 X 1.52mm N8-90-
178
BUN-340 - Backup Contoured NBR90 BS340 - 3.375 X 3.750 X 0.060" 67059169 75172166 86.31 X 4.65 X 1.52mm N8-90-
Product Information
Product CodeBUN-340
DescriptionBackup Contoured NBR90 BS340 - 3.375 X 3.750 X 0.060" 67059169 75172166 86.31 X 4.65 X 1.52mm N8-90-
ProfileBUN
Internal Diameter3.375
Outer Diameter3.750
Seal Height0.060
Max. Temp C110
Alt. Part No.R80340
BUN-043
Backup Contoured NBR90 BS043 - 3.500 X 3.625 X 0.045"
0
BUN-043 - Backup Contoured NBR90 BS043 - 3.500 X 3.625 X 0.045"
Product Information
Product CodeBUN-043
DescriptionBackup Contoured NBR90 BS043 - 3.500 X 3.625 X 0.045"
ProfileBUN
Internal Diameter3.500
Outer Diameter3.625
Seal Height0.045
Max. Temp C110
Alt. Part No.R80043
BUN-153
Backup Contoured NBR90 BS153 - 3.500 X 3.688 X 0.045"
95
BUN-153 - Backup Contoured NBR90 BS153 - 3.500 X 3.688 X 0.045"
Product Information
Product CodeBUN-153
DescriptionBackup Contoured NBR90 BS153 - 3.500 X 3.688 X 0.045"
ProfileBUN
Internal Diameter3.500
Outer Diameter3.688
Seal Height0.045
Max. Temp C110
Alt. Part No.R80153
BUN-238
Backup Contoured NBR90 BS238 - 3.500 X 3.750 X 0.040" 67059091 89.05 X 3.00 X 1.02mm 75172028
278
BUN-238 - Backup Contoured NBR90 BS238 - 3.500 X 3.750 X 0.040" 67059091 89.05 X 3.00 X 1.02mm 75172028
Product Information
Product CodeBUN-238
DescriptionBackup Contoured NBR90 BS238 - 3.500 X 3.750 X 0.040" 67059091 89.05 X 3.00 X 1.02mm 75172028
ProfileBUN
Internal Diameter3.500
Outer Diameter3.750
Seal Height0.040
Max. Temp C110
Alt. Part No.R80238
BUN-341
Backup Contoured NBR90 BS341 - 3.500 X 3.875 X 0.060" 67059170 89.48 X 4.65 X 1.52mm 75172168 N8-90-
97
BUN-341 - Backup Contoured NBR90 BS341 - 3.500 X 3.875 X 0.060" 67059170 89.48 X 4.65 X 1.52mm 75172168 N8-90-
Product Information
Product CodeBUN-341
DescriptionBackup Contoured NBR90 BS341 - 3.500 X 3.875 X 0.060" 67059170 89.48 X 4.65 X 1.52mm 75172168 N8-90-
ProfileBUN
Internal Diameter3.500
Outer Diameter3.875
Seal Height0.060
Max. Temp C110
Alt. Part No.R80341
BUN-239
Backup Contoured NBR90 BS239 - 3.625 X 3.875 X 0.040"
140
BUN-239 - Backup Contoured NBR90 BS239 - 3.625 X 3.875 X 0.040"
Product Information
Product CodeBUN-239
DescriptionBackup Contoured NBR90 BS239 - 3.625 X 3.875 X 0.040"
ProfileBUN
Internal Diameter3.625
Outer Diameter3.875
Seal Height0.040
Max. Temp C110
Alt. Part No.R80239
 
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