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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-360
Backup PTFE BS360 - 2.903 X 3.269 X 0.07"
0
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
BUTM-P003
Backup PTFE P003 - 3.00 X 6.00 X 1.25mm
-
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BUTM-P003 - Backup PTFE P003 - 3.00 X 6.00 X 1.25mm
Product Information
Product CodeBUTM-P003
DescriptionBackup PTFE P003 - 3.00 X 6.00 X 1.25mm
ProfileBUT
Internal Diameter3.00
Outer Diameter6.00
Seal Height1.25
Max. Temp C260
BUT-151
Backup PTFE BS151 - 3.005 X 3.181 X 0.05"
16
BUT-151 - Backup PTFE BS151 - 3.005 X 3.181 X 0.05"
Product Information
Product CodeBUT-151
DescriptionBackup PTFE BS151 - 3.005 X 3.181 X 0.05"
ProfileBUT
Internal Diameter3.005
Outer Diameter3.181
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS151
BUT-234
Backup PTFE BS234 - 3.005 X 3.243 X 0.049" 76.32 X 82.37 X 1.20mm 75172019 ST234S OLD CODE
55
BUT-234 - Backup PTFE BS234 - 3.005 X 3.243 X 0.049" 76.32 X 82.37 X 1.20mm 75172019 ST234S OLD CODE
Product Information
Product CodeBUT-234
DescriptionBackup PTFE BS234 - 3.005 X 3.243 X 0.049" 76.32 X 82.37 X 1.20mm 75172019 ST234S OLD CODE
ProfileBUT
Internal Diameter3.005
Outer Diameter3.243
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS234
BUT-337
Backup PTFE BS337 - 3.018 X 3.384 X 0.07"
6
BUT-337 - Backup PTFE BS337 - 3.018 X 3.384 X 0.07"
Product Information
Product CodeBUT-337
DescriptionBackup PTFE BS337 - 3.018 X 3.384 X 0.07"
ProfileBUT
Internal Diameter3.018
Outer Diameter3.384
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS337
BUT-041
Backup PTFE BS041 - 3.023 X 3.129 X 0.049"
0
BUT-041 - Backup PTFE BS041 - 3.023 X 3.129 X 0.049"
Product Information
Product CodeBUT-041
DescriptionBackup PTFE BS041 - 3.023 X 3.129 X 0.049"
ProfileBUT
Internal Diameter3.023
Outer Diameter3.129
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS041
BUT-235
Backup PTFE BS235 - 3.13 X 3.368 X 0.049" 75172022 79.50 X 85.54 X 1.20mm ST235S OLD CODE
34
BUT-235 - Backup PTFE BS235 - 3.13 X 3.368 X 0.049" 75172022 79.50 X 85.54 X 1.20mm ST235S OLD CODE
Product Information
Product CodeBUT-235
DescriptionBackup PTFE BS235 - 3.13 X 3.368 X 0.049" 75172022 79.50 X 85.54 X 1.20mm ST235S OLD CODE
ProfileBUT
Internal Diameter3.130
Outer Diameter3.368
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS235
BUT-152
Backup PTFE BS152 - 3.255 X 3.431 X 0.05"
16
BUT-152 - Backup PTFE BS152 - 3.255 X 3.431 X 0.05"
Product Information
Product CodeBUT-152
DescriptionBackup PTFE BS152 - 3.255 X 3.431 X 0.05"
ProfileBUT
Internal Diameter3.255
Outer Diameter3.431
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS152
BUT-236
Backup PTFE BS236 - 3.255 X 3.493 X 0.049" 75172025 82.67 X 88.72 X 1.20mm ST236S OLD CODE
212
BUT-236 - Backup PTFE BS236 - 3.255 X 3.493 X 0.049" 75172025 82.67 X 88.72 X 1.20mm ST236S OLD CODE
Product Information
Product CodeBUT-236
DescriptionBackup PTFE BS236 - 3.255 X 3.493 X 0.049" 75172025 82.67 X 88.72 X 1.20mm ST236S OLD CODE
ProfileBUT
Internal Diameter3.255
Outer Diameter3.493
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS236
BUT-042
Backup PTFE BS042 - 3.273 X 3.379 X 0.049"
8
BUT-042 - Backup PTFE BS042 - 3.273 X 3.379 X 0.049"
Product Information
Product CodeBUT-042
DescriptionBackup PTFE BS042 - 3.273 X 3.379 X 0.049"
ProfileBUT
Internal Diameter3.273
Outer Diameter3.379
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS042
BUT-339
Backup PTFE BS339 - 3.273 X 3.639 X 0.07"
13
BUT-339 - Backup PTFE BS339 - 3.273 X 3.639 X 0.07"
Product Information
Product CodeBUT-339
DescriptionBackup PTFE BS339 - 3.273 X 3.639 X 0.07"
ProfileBUT
Internal Diameter3.273
Outer Diameter3.639
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS339
BUT-237
Backup PTFE BS237 - 3.38 X 3.618 X 0.049"
9
BUT-237 - Backup PTFE BS237 - 3.38 X 3.618 X 0.049"
Product Information
Product CodeBUT-237
DescriptionBackup PTFE BS237 - 3.38 X 3.618 X 0.049"
ProfileBUT
Internal Diameter3.380
Outer Diameter3.618
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS237
BUT-340
Backup PTFE BS340 - 3.398 X 3.764 X 0.07"
3
BUT-340 - Backup PTFE BS340 - 3.398 X 3.764 X 0.07"
Product Information
Product CodeBUT-340
DescriptionBackup PTFE BS340 - 3.398 X 3.764 X 0.07"
ProfileBUT
Internal Diameter3.398
Outer Diameter3.764
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS340
BUT-153
Backup PTFE BS153 - 3.505 X 3.681 X 0.05"
4
BUT-153 - Backup PTFE BS153 - 3.505 X 3.681 X 0.05"
Product Information
Product CodeBUT-153
DescriptionBackup PTFE BS153 - 3.505 X 3.681 X 0.05"
ProfileBUT
Internal Diameter3.505
Outer Diameter3.681
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS153
BUT-238
Backup PTFE BS238 - 3.505 X 3.743 X 0.049"
107
BUT-238 - Backup PTFE BS238 - 3.505 X 3.743 X 0.049"
Product Information
Product CodeBUT-238
DescriptionBackup PTFE BS238 - 3.505 X 3.743 X 0.049"
ProfileBUT
Internal Diameter3.505
Outer Diameter3.743
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS238
BUT-043
Backup PTFE BS043 - 3.523 X 3.629 X 0.049"
0
BUT-043 - Backup PTFE BS043 - 3.523 X 3.629 X 0.049"
Product Information
Product CodeBUT-043
DescriptionBackup PTFE BS043 - 3.523 X 3.629 X 0.049"
ProfileBUT
Internal Diameter3.523
Outer Diameter3.629
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS043
BUT-341
Backup PTFE BS341 - 3.523 X 3.889 X 0.07"
424
BUT-341 - Backup PTFE BS341 - 3.523 X 3.889 X 0.07"
Product Information
Product CodeBUT-341
DescriptionBackup PTFE BS341 - 3.523 X 3.889 X 0.07"
ProfileBUT
Internal Diameter3.523
Outer Diameter3.889
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS341
BUT-239
Backup PTFE BS239 - 3.63 X 3.868 X 0.049"
1,382
BUT-239 - Backup PTFE BS239 - 3.63 X 3.868 X 0.049"
Product Information
Product CodeBUT-239
DescriptionBackup PTFE BS239 - 3.63 X 3.868 X 0.049"
ProfileBUT
Internal Diameter3.630
Outer Diameter3.868
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS239
BUT-342
Backup PTFE BS342 - 3.648 X 4.014 X 0.07"
8
BUT-342 - Backup PTFE BS342 - 3.648 X 4.014 X 0.07"
Product Information
Product CodeBUT-342
DescriptionBackup PTFE BS342 - 3.648 X 4.014 X 0.07"
ProfileBUT
Internal Diameter3.648
Outer Diameter4.014
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS342
BUT-154
Backup PTFE BS154 - 3.755 X 3.931 X 0.05"
17
BUT-154 - Backup PTFE BS154 - 3.755 X 3.931 X 0.05"
Product Information
Product CodeBUT-154
DescriptionBackup PTFE BS154 - 3.755 X 3.931 X 0.05"
ProfileBUT
Internal Diameter3.755
Outer Diameter3.931
Seal Height0.050
Max. Temp C260
Alt. Part No.RMS154
BUT-240
Backup PTFE BS240 - 3.755 X 3.993 X 0.049" 75089450 ST240S 95.37 X 101.42 X 1.20mm
201
BUT-240 - Backup PTFE BS240 - 3.755 X 3.993 X 0.049" 75089450 ST240S 95.37 X 101.42 X 1.20mm
Product Information
Product CodeBUT-240
DescriptionBackup PTFE BS240 - 3.755 X 3.993 X 0.049" 75089450 ST240S 95.37 X 101.42 X 1.20mm
ProfileBUT
Internal Diameter3.755
Outer Diameter3.993
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS240
BUT-044
Backup PTFE BS044 - 3.773 X 3.879 X 0.049"
0
BUT-044 - Backup PTFE BS044 - 3.773 X 3.879 X 0.049"
Product Information
Product CodeBUT-044
DescriptionBackup PTFE BS044 - 3.773 X 3.879 X 0.049"
ProfileBUT
Internal Diameter3.773
Outer Diameter3.879
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS044
BUT-343
Backup PTFE BS343 - 3.773 X 4.139 X 0.07"
38
BUT-343 - Backup PTFE BS343 - 3.773 X 4.139 X 0.07"
Product Information
Product CodeBUT-343
DescriptionBackup PTFE BS343 - 3.773 X 4.139 X 0.07"
ProfileBUT
Internal Diameter3.773
Outer Diameter4.139
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS343
BUT-241
Backup PTFE BS241 - 3.88 X 4.118 X 0.049"
0
BUT-241 - Backup PTFE BS241 - 3.88 X 4.118 X 0.049"
Product Information
Product CodeBUT-241
DescriptionBackup PTFE BS241 - 3.88 X 4.118 X 0.049"
ProfileBUT
Internal Diameter3.880
Outer Diameter4.118
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS241
 
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