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BUT
Design
    • Provides exceptional extrusion resistance to a paired oring to increase pressure handling capabilities.
    • Ideal in applications where low friction is a priority.
    • Can be used as a backup to a hydraulic seal or an oring.
    • PTFE will 'cold-flow' into an extrusion gap to provide superior extrusion resistance to Nitrile.
Material
    • PTFE
Application
    • Suitable for static and dynamic applications.
    • Suitable for high pressure and heavy duty applications where additional resistance to extrusion is required.
Fluids
    • Hydraulic fluids, petroleum fuels and oils

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Product Code
Description
Availability
Qty
BUT-229
Backup PTFE BS229 - 2.397 X 2.635 X 0.049"
37
BUT-229 - Backup PTFE BS229 - 2.397 X 2.635 X 0.049"
Product Information
Product CodeBUT-229
DescriptionBackup PTFE BS229 - 2.397 X 2.635 X 0.049"
ProfileBUT
Internal Diameter2.397
Outer Diameter2.635
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS229
BUT-036
Backup PTFE BS036 - 2.398 X 2.504 X 0.049"
72
BUT-036 - Backup PTFE BS036 - 2.398 X 2.504 X 0.049"
Product Information
Product CodeBUT-036
DescriptionBackup PTFE BS036 - 2.398 X 2.504 X 0.049"
ProfileBUT
Internal Diameter2.398
Outer Diameter2.504
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS036
BUT-143
Backup PTFE BS143 - 2.442 X 2.618 X 0.05"
60
BUT-143 - Backup PTFE BS143 - 2.442 X 2.618 X 0.05"
Product Information
Product CodeBUT-143
DescriptionBackup PTFE BS143 - 2.442 X 2.618 X 0.05"
ProfileBUT
Internal Diameter2.442
Outer Diameter2.618
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS143
BUT-144
Backup PTFE BS144 - 2.504 X 2.68 X 0.05"
42
BUT-144 - Backup PTFE BS144 - 2.504 X 2.68 X 0.05"
Product Information
Product CodeBUT-144
DescriptionBackup PTFE BS144 - 2.504 X 2.68 X 0.05"
ProfileBUT
Internal Diameter2.504
Outer Diameter2.680
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS144
BUT-333
Backup PTFE BS333 - 2.518 X 2.884 X 0.07"
79
BUT-333 - Backup PTFE BS333 - 2.518 X 2.884 X 0.07"
Product Information
Product CodeBUT-333
DescriptionBackup PTFE BS333 - 2.518 X 2.884 X 0.07"
ProfileBUT
Internal Diameter2.518
Outer Diameter2.884
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS333
BUT-230
Backup PTFE BS230 - 2.522 X 2.76 X 0.049" 75089438 ST230S OLD CODE
74
BUT-230 - Backup PTFE BS230 - 2.522 X 2.76 X 0.049" 75089438 ST230S OLD CODE
Product Information
Product CodeBUT-230
DescriptionBackup PTFE BS230 - 2.522 X 2.76 X 0.049" 75089438 ST230S OLD CODE
ProfileBUT
Internal Diameter2.522
Outer Diameter2.760
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS230
BUT-037
Backup PTFE BS037 - 2.523 X 2.629 X 0.049"
232
BUT-037 - Backup PTFE BS037 - 2.523 X 2.629 X 0.049"
Product Information
Product CodeBUT-037
DescriptionBackup PTFE BS037 - 2.523 X 2.629 X 0.049"
ProfileBUT
Internal Diameter2.523
Outer Diameter2.629
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS037
BUT-145
Backup PTFE BS145 - 2.567 X 2.743 X 0.05"
6
BUT-145 - Backup PTFE BS145 - 2.567 X 2.743 X 0.05"
Product Information
Product CodeBUT-145
DescriptionBackup PTFE BS145 - 2.567 X 2.743 X 0.05"
ProfileBUT
Internal Diameter2.567
Outer Diameter2.743
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS145
BUT-146
Backup PTFE BS146 - 2.629 X 2.805 X 0.05"
41
BUT-146 - Backup PTFE BS146 - 2.629 X 2.805 X 0.05"
Product Information
Product CodeBUT-146
DescriptionBackup PTFE BS146 - 2.629 X 2.805 X 0.05"
ProfileBUT
Internal Diameter2.629
Outer Diameter2.805
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS146
BUT-231
Backup PTFE BS231 - 2.63 X 2.868 X 0.049"
24
BUT-231 - Backup PTFE BS231 - 2.63 X 2.868 X 0.049"
Product Information
Product CodeBUT-231
DescriptionBackup PTFE BS231 - 2.63 X 2.868 X 0.049"
ProfileBUT
Internal Diameter2.630
Outer Diameter2.868
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS231
BUT-334
Backup PTFE BS334 - 2.643 X 3.009 X 0.07" 75089541 ST334S OLD CODE
30
BUT-334 - Backup PTFE BS334 - 2.643 X 3.009 X 0.07" 75089541 ST334S OLD CODE
Product Information
Product CodeBUT-334
DescriptionBackup PTFE BS334 - 2.643 X 3.009 X 0.07" 75089541 ST334S OLD CODE
ProfileBUT
Internal Diameter2.643
Outer Diameter3.009
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS334
BUT-038
Backup PTFE BS038 - 2.648 X 2.754 X 0.049"
98
BUT-038 - Backup PTFE BS038 - 2.648 X 2.754 X 0.049"
Product Information
Product CodeBUT-038
DescriptionBackup PTFE BS038 - 2.648 X 2.754 X 0.049"
ProfileBUT
Internal Diameter2.648
Outer Diameter2.754
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS038
BUT-147
Backup PTFE BS147 - 2.692 X 2.868 X 0.05"
51
BUT-147 - Backup PTFE BS147 - 2.692 X 2.868 X 0.05"
Product Information
Product CodeBUT-147
DescriptionBackup PTFE BS147 - 2.692 X 2.868 X 0.05"
ProfileBUT
Internal Diameter2.692
Outer Diameter2.868
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS147
BUT-148
Backup PTFE BS148 - 2.754 X 2.93 X 0.05"
27
BUT-148 - Backup PTFE BS148 - 2.754 X 2.93 X 0.05"
Product Information
Product CodeBUT-148
DescriptionBackup PTFE BS148 - 2.754 X 2.93 X 0.05"
ProfileBUT
Internal Diameter2.754
Outer Diameter2.930
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS148
BUT-232
Backup PTFE BS232 - 2.755 X 2.993 X 0.049" 75172013 69.97 X 76.02 X 1.20mm ST232S OLD CODE
44
BUT-232 - Backup PTFE BS232 - 2.755 X 2.993 X 0.049" 75172013 69.97 X 76.02 X 1.20mm ST232S OLD CODE
Product Information
Product CodeBUT-232
DescriptionBackup PTFE BS232 - 2.755 X 2.993 X 0.049" 75172013 69.97 X 76.02 X 1.20mm ST232S OLD CODE
ProfileBUT
Internal Diameter2.755
Outer Diameter2.993
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS232
BUT-335
Backup PTFE BS335 - 2.768 X 3.134 X 0.07"
37
BUT-335 - Backup PTFE BS335 - 2.768 X 3.134 X 0.07"
Product Information
Product CodeBUT-335
DescriptionBackup PTFE BS335 - 2.768 X 3.134 X 0.07"
ProfileBUT
Internal Diameter2.768
Outer Diameter3.134
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS335
BUT-039
Backup PTFE BS039 - 2.773 X 2.879 X 0.049"
75
BUT-039 - Backup PTFE BS039 - 2.773 X 2.879 X 0.049"
Product Information
Product CodeBUT-039
DescriptionBackup PTFE BS039 - 2.773 X 2.879 X 0.049"
ProfileBUT
Internal Diameter2.773
Outer Diameter2.879
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS039
BUT-359
Backup PTFE BS359 - 2.778 X 3.144 X 0.07"
0
BUT-359 - Backup PTFE BS359 - 2.778 X 3.144 X 0.07"
Product Information
Product CodeBUT-359
DescriptionBackup PTFE BS359 - 2.778 X 3.144 X 0.07"
ProfileBUT
Internal Diameter2.778
Outer Diameter3.144
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS359
BUT-149
Backup PTFE BS149 - 2.817 X 2.993 X 0.05"
1
BUT-149 - Backup PTFE BS149 - 2.817 X 2.993 X 0.05"
Product Information
Product CodeBUT-149
DescriptionBackup PTFE BS149 - 2.817 X 2.993 X 0.05"
ProfileBUT
Internal Diameter2.817
Outer Diameter2.993
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS149
BUT-150
Backup PTFE BS150 - 2.88 X 3.056 X 0.05"
28
BUT-150 - Backup PTFE BS150 - 2.88 X 3.056 X 0.05"
Product Information
Product CodeBUT-150
DescriptionBackup PTFE BS150 - 2.88 X 3.056 X 0.05"
ProfileBUT
Internal Diameter2.880
Outer Diameter3.056
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS150
BUT-233
Backup PTFE BS233 - 2.88 X 3.118 X 0.049" 75089443 ST233S OLD CODE 73.15 X 79.19 X 1.20mm
65
BUT-233 - Backup PTFE BS233 - 2.88 X 3.118 X 0.049" 75089443 ST233S OLD CODE 73.15 X 79.19 X 1.20mm
Product Information
Product CodeBUT-233
DescriptionBackup PTFE BS233 - 2.88 X 3.118 X 0.049" 75089443 ST233S OLD CODE 73.15 X 79.19 X 1.20mm
ProfileBUT
Internal Diameter2.880
Outer Diameter3.118
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS233
BUT-336
Backup PTFE BS336 - 2.893 X 3.259 X 0.07"
45
BUT-336 - Backup PTFE BS336 - 2.893 X 3.259 X 0.07"
Product Information
Product CodeBUT-336
DescriptionBackup PTFE BS336 - 2.893 X 3.259 X 0.07"
ProfileBUT
Internal Diameter2.893
Outer Diameter3.259
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS336
BUT-040
Backup PTFE BS040 - 2.898 X 3.004 X 0.049"
0
BUT-040 - Backup PTFE BS040 - 2.898 X 3.004 X 0.049"
Product Information
Product CodeBUT-040
DescriptionBackup PTFE BS040 - 2.898 X 3.004 X 0.049"
ProfileBUT
Internal Diameter2.898
Outer Diameter3.004
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS040
BUT-360
Backup PTFE BS360 - 2.903 X 3.269 X 0.07"
2
BUT-360 - Backup PTFE BS360 - 2.903 X 3.269 X 0.07"
Product Information
Product CodeBUT-360
DescriptionBackup PTFE BS360 - 2.903 X 3.269 X 0.07"
ProfileBUT
Internal Diameter2.903
Outer Diameter3.269
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS360
 
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