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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-330
Backup Contoured NBR90 BS330 - 2.125 X 2.500 X 0.060" 75172142 67059159 N8-90-330 OLD CODE 54.30 X 6
662
BUN-330 - Backup Contoured NBR90 BS330 - 2.125 X 2.500 X 0.060" 75172142 67059159 N8-90-330 OLD CODE 54.30 X 6
Product Information
Product CodeBUN-330
DescriptionBackup Contoured NBR90 BS330 - 2.125 X 2.500 X 0.060" 75172142 67059159 N8-90-330 OLD CODE 54.30 X 6
ProfileBUN
Internal Diameter2.125
Outer Diameter2.500
Seal Height0.060
Max. Temp C110
Alt. Part No.R80330
BUN-139
Backup Contoured NBR90 BS139 - 2.187 X 2.375 X 0.045" 67059014 75171892 56.03 x 1.14mm N8-90-139 OLD
442
BUN-139 - Backup Contoured NBR90 BS139 - 2.187 X 2.375 X 0.045" 67059014 75171892 56.03 x 1.14mm N8-90-139 OLD
Product Information
Product CodeBUN-139
DescriptionBackup Contoured NBR90 BS139 - 2.187 X 2.375 X 0.045" 67059014 75171892 56.03 x 1.14mm N8-90-139 OLD
ProfileBUN
Internal Diameter2.187
Outer Diameter2.375
Seal Height0.045
Max. Temp C110
Alt. Part No.R80139
BUN-035
Backup Contoured NBR90 BS035 - 2.250 X 2.375 X 0.045"
0
BUN-035 - Backup Contoured NBR90 BS035 - 2.250 X 2.375 X 0.045"
Product Information
Product CodeBUN-035
DescriptionBackup Contoured NBR90 BS035 - 2.250 X 2.375 X 0.045"
ProfileBUN
Internal Diameter2.250
Outer Diameter2.375
Seal Height0.045
Max. Temp C110
Alt. Part No.R80035
BUN-140
Backup Contoured NBR90 BS140 - 2.250 X 2.438 X 0.045"
2,044
BUN-140 - Backup Contoured NBR90 BS140 - 2.250 X 2.438 X 0.045"
Product Information
Product CodeBUN-140
DescriptionBackup Contoured NBR90 BS140 - 2.250 X 2.438 X 0.045"
ProfileBUN
Internal Diameter2.250
Outer Diameter2.438
Seal Height0.045
Max. Temp C110
Alt. Part No.R80140
BUN-228
Backup Contoured NBR90 BS228 - 2.250 X 2.500 X 0.040" 75172000 67059081 N8-90-228 OLD CODE 57.70 X 6
686
BUN-228 - Backup Contoured NBR90 BS228 - 2.250 X 2.500 X 0.040" 75172000 67059081 N8-90-228 OLD CODE 57.70 X 6
Product Information
Product CodeBUN-228
DescriptionBackup Contoured NBR90 BS228 - 2.250 X 2.500 X 0.040" 75172000 67059081 N8-90-228 OLD CODE 57.70 X 6
ProfileBUN
Internal Diameter2.250
Outer Diameter2.500
Seal Height0.040
Max. Temp C110
Alt. Part No.R80228
BUN-331
Backup Contoured NBR90 BS331 - 2.250 X 2.625 X 0.060"
1,994
BUN-331 - Backup Contoured NBR90 BS331 - 2.250 X 2.625 X 0.060"
Product Information
Product CodeBUN-331
DescriptionBackup Contoured NBR90 BS331 - 2.250 X 2.625 X 0.060"
ProfileBUN
Internal Diameter2.250
Outer Diameter2.625
Seal Height0.060
Max. Temp C110
Alt. Part No.R80331
BUN-141
Backup Contoured NBR90 BS141 - 2.312 X 2.500 X 0.045" 75171896 N8-90-141 OLD CODE 67059016 59.21 X 2
244
BUN-141 - Backup Contoured NBR90 BS141 - 2.312 X 2.500 X 0.045" 75171896 N8-90-141 OLD CODE 67059016 59.21 X 2
Product Information
Product CodeBUN-141
DescriptionBackup Contoured NBR90 BS141 - 2.312 X 2.500 X 0.045" 75171896 N8-90-141 OLD CODE 67059016 59.21 X 2
ProfileBUN
Internal Diameter2.312
Outer Diameter2.500
Seal Height0.045
Max. Temp C110
Alt. Part No.R80141
BUN-036
Backup Contoured NBR90 BS036 - 2.375 X 2.500 X 0.045"
0
BUN-036 - Backup Contoured NBR90 BS036 - 2.375 X 2.500 X 0.045"
Product Information
Product CodeBUN-036
DescriptionBackup Contoured NBR90 BS036 - 2.375 X 2.500 X 0.045"
ProfileBUN
Internal Diameter2.375
Outer Diameter2.500
Seal Height0.045
Max. Temp C110
Alt. Part No.R80036
BUN-142
Backup Contoured NBR90 BS142 - 2.375 X 2.563 X 0.045"
457
BUN-142 - Backup Contoured NBR90 BS142 - 2.375 X 2.563 X 0.045"
Product Information
Product CodeBUN-142
DescriptionBackup Contoured NBR90 BS142 - 2.375 X 2.563 X 0.045"
ProfileBUN
Internal Diameter2.375
Outer Diameter2.563
Seal Height0.045
Max. Temp C110
Alt. Part No.R80142
BUN-229
Backup Contoured NBR90 BS229 - 2.375 X 2.625 X 0.040" 60.33 x 66.68 x 1.02mm 75172003 N8-90-229 OLD
1,372
BUN-229 - Backup Contoured NBR90 BS229 - 2.375 X 2.625 X 0.040" 60.33 x 66.68 x 1.02mm 75172003 N8-90-229 OLD
Product Information
Product CodeBUN-229
DescriptionBackup Contoured NBR90 BS229 - 2.375 X 2.625 X 0.040" 60.33 x 66.68 x 1.02mm 75172003 N8-90-229 OLD
ProfileBUN
Internal Diameter2.375
Outer Diameter2.625
Seal Height0.040
Max. Temp C110
Alt. Part No.R80229
BUN-332
Backup Contoured NBR90 BS332 - 2.375 X 2.750 X 0.060"
373
BUN-332 - Backup Contoured NBR90 BS332 - 2.375 X 2.750 X 0.060"
Product Information
Product CodeBUN-332
DescriptionBackup Contoured NBR90 BS332 - 2.375 X 2.750 X 0.060"
ProfileBUN
Internal Diameter2.375
Outer Diameter2.750
Seal Height0.060
Max. Temp C110
Alt. Part No.R80332
BUN-143
Backup Contoured NBR90 BS143 - 2.437 X 2.625 X 0.045"
93
BUN-143 - Backup Contoured NBR90 BS143 - 2.437 X 2.625 X 0.045"
Product Information
Product CodeBUN-143
DescriptionBackup Contoured NBR90 BS143 - 2.437 X 2.625 X 0.045"
ProfileBUN
Internal Diameter2.437
Outer Diameter2.625
Seal Height0.045
Max. Temp C110
Alt. Part No.R80143
BUN-037
Backup Contoured NBR90 BS037 - 2.500 X 2.625 X 0.045"
0
BUN-037 - Backup Contoured NBR90 BS037 - 2.500 X 2.625 X 0.045"
Product Information
Product CodeBUN-037
DescriptionBackup Contoured NBR90 BS037 - 2.500 X 2.625 X 0.045"
ProfileBUN
Internal Diameter2.500
Outer Diameter2.625
Seal Height0.045
Max. Temp C110
Alt. Part No.R80037
BUN-144
Backup Contoured NBR90 BS144 - 2.500 X 2.688 X 0.045"
1,670
BUN-144 - Backup Contoured NBR90 BS144 - 2.500 X 2.688 X 0.045"
Product Information
Product CodeBUN-144
DescriptionBackup Contoured NBR90 BS144 - 2.500 X 2.688 X 0.045"
ProfileBUN
Internal Diameter2.500
Outer Diameter2.688
Seal Height0.045
Max. Temp C110
Alt. Part No.R80144
BUN-230
Backup Contoured NBR90 BS230 - 2.500 X 2.750 X 0.040"
134
BUN-230 - Backup Contoured NBR90 BS230 - 2.500 X 2.750 X 0.040"
Product Information
Product CodeBUN-230
DescriptionBackup Contoured NBR90 BS230 - 2.500 X 2.750 X 0.040"
ProfileBUN
Internal Diameter2.500
Outer Diameter2.750
Seal Height0.040
Max. Temp C110
Alt. Part No.R80230
BUN-333
Backup Contoured NBR90 BS333 - 2.500 X 2.875 X 0.060"
113
BUN-333 - Backup Contoured NBR90 BS333 - 2.500 X 2.875 X 0.060"
Product Information
Product CodeBUN-333
DescriptionBackup Contoured NBR90 BS333 - 2.500 X 2.875 X 0.060"
ProfileBUN
Internal Diameter2.500
Outer Diameter2.875
Seal Height0.060
Max. Temp C110
Alt. Part No.R80333
BUN-145
Backup Contoured NBR90 BS145 - 2.562 X 2.750 X 0.045"
440
BUN-145 - Backup Contoured NBR90 BS145 - 2.562 X 2.750 X 0.045"
Product Information
Product CodeBUN-145
DescriptionBackup Contoured NBR90 BS145 - 2.562 X 2.750 X 0.045"
ProfileBUN
Internal Diameter2.562
Outer Diameter2.750
Seal Height0.045
Max. Temp C110
Alt. Part No.R80145
BUN-038
Backup Contoured NBR90 BS038 - 2.625 X 2.750 X 0.045"
0
BUN-038 - Backup Contoured NBR90 BS038 - 2.625 X 2.750 X 0.045"
Product Information
Product CodeBUN-038
DescriptionBackup Contoured NBR90 BS038 - 2.625 X 2.750 X 0.045"
ProfileBUN
Internal Diameter2.625
Outer Diameter2.750
Seal Height0.045
Max. Temp C110
Alt. Part No.R80038
BUN-146
Backup Contoured NBR90 BS146 - 2.625 X 2.813 X 0.045"
100
BUN-146 - Backup Contoured NBR90 BS146 - 2.625 X 2.813 X 0.045"
Product Information
Product CodeBUN-146
DescriptionBackup Contoured NBR90 BS146 - 2.625 X 2.813 X 0.045"
ProfileBUN
Internal Diameter2.625
Outer Diameter2.813
Seal Height0.045
Max. Temp C110
Alt. Part No.R80146
BUN-231
Backup Contoured NBR90 BS231 - 2.625 X 2.875 X 0.040"
90
BUN-231 - Backup Contoured NBR90 BS231 - 2.625 X 2.875 X 0.040"
Product Information
Product CodeBUN-231
DescriptionBackup Contoured NBR90 BS231 - 2.625 X 2.875 X 0.040"
ProfileBUN
Internal Diameter2.625
Outer Diameter2.875
Seal Height0.040
Max. Temp C110
Alt. Part No.R80231
BUN-334
Backup Contoured NBR90 BS334 - 2.625 X 3.000 X 0.060" 75172150 67059163 N8-90-334 OLD CODE 67.13 X
226
BUN-334 - Backup Contoured NBR90 BS334 - 2.625 X 3.000 X 0.060" 75172150 67059163 N8-90-334 OLD CODE 67.13 X
Product Information
Product CodeBUN-334
DescriptionBackup Contoured NBR90 BS334 - 2.625 X 3.000 X 0.060" 75172150 67059163 N8-90-334 OLD CODE 67.13 X
ProfileBUN
Internal Diameter2.625
Outer Diameter3.000
Seal Height0.060
Max. Temp C110
Alt. Part No.R80334
BUN-147
Backup Contoured NBR90 BS147 - 2.687 X 2.875 X 0.045"
2,229
BUN-147 - Backup Contoured NBR90 BS147 - 2.687 X 2.875 X 0.045"
Product Information
Product CodeBUN-147
DescriptionBackup Contoured NBR90 BS147 - 2.687 X 2.875 X 0.045"
ProfileBUN
Internal Diameter2.687
Outer Diameter2.875
Seal Height0.045
Max. Temp C110
Alt. Part No.R80147
BUN-039
Backup Contoured NBR90 BS039 - 2.750 X 2.875 X 0.045"
0
BUN-039 - Backup Contoured NBR90 BS039 - 2.750 X 2.875 X 0.045"
Product Information
Product CodeBUN-039
DescriptionBackup Contoured NBR90 BS039 - 2.750 X 2.875 X 0.045"
ProfileBUN
Internal Diameter2.750
Outer Diameter2.875
Seal Height0.045
Max. Temp C110
Alt. Part No.R80039
BUN-148
Backup Contoured NBR90 BS148 - 2.750 X 2.938 X 0.045"
186
BUN-148 - Backup Contoured NBR90 BS148 - 2.750 X 2.938 X 0.045"
Product Information
Product CodeBUN-148
DescriptionBackup Contoured NBR90 BS148 - 2.750 X 2.938 X 0.045"
ProfileBUN
Internal Diameter2.750
Outer Diameter2.938
Seal Height0.045
Max. Temp C110
Alt. Part No.R80148
 
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