BUT Backup Rings | PTFE Sealing O-Rings | FST Australia
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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-015 SPIRAL
Backup PTFE BS015 - 0.58 X 0.686 X 0.049"
62
BUT-015 SPIRAL - Backup PTFE BS015 - 0.58 X 0.686 X 0.049"
Product Information
Product CodeBUT-015 SPIRAL
DescriptionBackup PTFE BS015 - 0.58 X 0.686 X 0.049"
Internal Diameter0.580
Outer Diameter0.686
Seal Height0.049
BUT-312
Backup PTFE BS312 - 0.638 X 1.004 X 0.07"
316
BUT-312 - Backup PTFE BS312 - 0.638 X 1.004 X 0.07"
Product Information
Product CodeBUT-312
DescriptionBackup PTFE BS312 - 0.638 X 1.004 X 0.07"
ProfileBUT
Internal Diameter0.638
Outer Diameter1.004
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS312
BUT-114
Backup PTFE BS114 - 0.64 X 0.812 X 0.049"
1,128
BUT-114 - Backup PTFE BS114 - 0.64 X 0.812 X 0.049"
Product Information
Product CodeBUT-114
DescriptionBackup PTFE BS114 - 0.64 X 0.812 X 0.049"
ProfileBUT
Internal Diameter0.640
Outer Diameter0.812
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS114
BUT-208
Backup PTFE BS208 - 0.641 X 0.879 X 0.049"
749
BUT-208 - Backup PTFE BS208 - 0.641 X 0.879 X 0.049"
Product Information
Product CodeBUT-208
DescriptionBackup PTFE BS208 - 0.641 X 0.879 X 0.049"
ProfileBUT
Internal Diameter0.641
Outer Diameter0.879
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS208
BUT-016 THIN
Backup PTFE BS016 - 0.643 X 0.749 X 0.031"
337
BUT-016 THIN - Backup PTFE BS016 - 0.643 X 0.749 X 0.031"
Product Information
Product CodeBUT-016 THIN
DescriptionBackup PTFE BS016 - 0.643 X 0.749 X 0.031"
Internal Diameter0.643
Outer Diameter0.749
Seal Height0.031
BUT-016SC
Backup PTFE BS016 - 0.643 X 0.749 X 0.049" SCARF CUT 7517174
20
BUT-016SC - Backup PTFE BS016 - 0.643 X 0.749 X 0.049" SCARF CUT 7517174
Product Information
Product CodeBUT-016SC
DescriptionBackup PTFE BS016 - 0.643 X 0.749 X 0.049" SCARF CUT 7517174
Internal Diameter0.643
Outer Diameter0.749
Seal Height0.049
BUT-016
Backup PTFE BS016 - 0.643 X 0.749 X 0.049"
520
BUT-016 - Backup PTFE BS016 - 0.643 X 0.749 X 0.049"
Product Information
Product CodeBUT-016
DescriptionBackup PTFE BS016 - 0.643 X 0.749 X 0.049"
ProfileBUT
Internal Diameter0.643
Outer Diameter0.749
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS016
BUT-016 SPIRAL
Backup PTFE BS016 - 0.643 X 0.749 X 0.049"
52
BUT-016 SPIRAL - Backup PTFE BS016 - 0.643 X 0.749 X 0.049"
Product Information
Product CodeBUT-016 SPIRAL
DescriptionBackup PTFE BS016 - 0.643 X 0.749 X 0.049"
Internal Diameter0.643
Outer Diameter0.749
Seal Height0.049
BUT-209
Backup PTFE BS209 - 0.68 X 0.918 X 0.049"
908
BUT-209 - Backup PTFE BS209 - 0.68 X 0.918 X 0.049"
Product Information
Product CodeBUT-209
DescriptionBackup PTFE BS209 - 0.68 X 0.918 X 0.049"
ProfileBUT
Internal Diameter0.680
Outer Diameter0.918
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS209
BUT-115
Backup PTFE BS115 - 0.702 X 0.874 X 0.049" 75089295 17.45 X 21.92 X 1.20mm ST115S OLD CODE
691
BUT-115 - Backup PTFE BS115 - 0.702 X 0.874 X 0.049" 75089295 17.45 X 21.92 X 1.20mm ST115S OLD CODE
Product Information
Product CodeBUT-115
DescriptionBackup PTFE BS115 - 0.702 X 0.874 X 0.049" 75089295 17.45 X 21.92 X 1.20mm ST115S OLD CODE
ProfileBUT
Internal Diameter0.702
Outer Diameter0.874
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS115
BUT-017 THIN
Backup PTFE BS017 - 0.705 X 0.811 X 0.049"
363
BUT-017 THIN - Backup PTFE BS017 - 0.705 X 0.811 X 0.049"
Product Information
Product CodeBUT-017 THIN
DescriptionBackup PTFE BS017 - 0.705 X 0.811 X 0.049"
Internal Diameter0.705
Outer Diameter0.811
Seal Height0.031
BUT-017
Backup PTFE BS017 - 0.705 X 0.811 X 0.049"
40
BUT-017 - Backup PTFE BS017 - 0.705 X 0.811 X 0.049"
Product Information
Product CodeBUT-017
DescriptionBackup PTFE BS017 - 0.705 X 0.811 X 0.049"
ProfileBUT
Internal Diameter0.705
Outer Diameter0.811
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS017
BUT-314
Backup PTFE BS314 - 0.763 X 1.129 X 0.07"
15
BUT-314 - Backup PTFE BS314 - 0.763 X 1.129 X 0.07"
Product Information
Product CodeBUT-314
DescriptionBackup PTFE BS314 - 0.763 X 1.129 X 0.07"
ProfileBUT
Internal Diameter0.763
Outer Diameter1.129
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS314
BUT-116
Backup PTFE BS116 - 0.765 X 0.937 X 0.049"
262
BUT-116 - Backup PTFE BS116 - 0.765 X 0.937 X 0.049"
Product Information
Product CodeBUT-116
DescriptionBackup PTFE BS116 - 0.765 X 0.937 X 0.049"
ProfileBUT
Internal Diameter0.765
Outer Diameter0.937
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS116
BUT-210
Backup PTFE BS210 - 0.766 X 1.004 X 0.049"
105
BUT-210 - Backup PTFE BS210 - 0.766 X 1.004 X 0.049"
Product Information
Product CodeBUT-210
DescriptionBackup PTFE BS210 - 0.766 X 1.004 X 0.049"
ProfileBUT
Internal Diameter0.766
Outer Diameter1.004
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS210
BUT-018 THIN
Backup PTFE BS018 - 0.768 X 0.874 X 0.049"
310
BUT-018 THIN - Backup PTFE BS018 - 0.768 X 0.874 X 0.049"
Product Information
Product CodeBUT-018 THIN
DescriptionBackup PTFE BS018 - 0.768 X 0.874 X 0.049"
Internal Diameter0.768
Outer Diameter0.874
Seal Height0.031
BUT-018
Backup PTFE BS018 - 0.768 X 0.874 X 0.049"
272
BUT-018 - Backup PTFE BS018 - 0.768 X 0.874 X 0.049"
Product Information
Product CodeBUT-018
DescriptionBackup PTFE BS018 - 0.768 X 0.874 X 0.049"
ProfileBUT
Internal Diameter0.768
Outer Diameter0.874
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS018
BUT-315
Backup PTFE BS315 - 0.825 X 1.191 X 0.07"
35
BUT-315 - Backup PTFE BS315 - 0.825 X 1.191 X 0.07"
Product Information
Product CodeBUT-315
DescriptionBackup PTFE BS315 - 0.825 X 1.191 X 0.07"
ProfileBUT
Internal Diameter0.825
Outer Diameter1.191
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS315
BUT-211
Backup PTFE BS211 - 0.828 X 1.066 X 0.049"
81
BUT-211 - Backup PTFE BS211 - 0.828 X 1.066 X 0.049"
Product Information
Product CodeBUT-211
DescriptionBackup PTFE BS211 - 0.828 X 1.066 X 0.049"
ProfileBUT
Internal Diameter0.828
Outer Diameter1.066
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS211
BUT-019
Backup PTFE BS019 - 0.83 X 0.936 X 0.049" 75089216 20.70 X 23.49 X 1.20mm
272
BUT-019 - Backup PTFE BS019 - 0.83 X 0.936 X 0.049" 75089216 20.70 X 23.49 X 1.20mm
Product Information
Product CodeBUT-019
DescriptionBackup PTFE BS019 - 0.83 X 0.936 X 0.049" 75089216 20.70 X 23.49 X 1.20mm
ProfileBUT
Internal Diameter0.830
Outer Diameter0.936
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS019
BUT-117
Backup PTFE BS117 - 0.832 X 1.004 X 0.049"
1,076
BUT-117 - Backup PTFE BS117 - 0.832 X 1.004 X 0.049"
Product Information
Product CodeBUT-117
DescriptionBackup PTFE BS117 - 0.832 X 1.004 X 0.049"
ProfileBUT
Internal Diameter0.832
Outer Diameter1.004
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS117
BUT-316
Backup PTFE BS316 - 0.888 X 1.254 X 0.07"
0
BUT-316 - Backup PTFE BS316 - 0.888 X 1.254 X 0.07"
Product Information
Product CodeBUT-316
DescriptionBackup PTFE BS316 - 0.888 X 1.254 X 0.07"
ProfileBUT
Internal Diameter0.888
Outer Diameter1.254
Seal Height0.070
Max. Temp C260
Alt. Part No.RMS316
BUT-212
Backup PTFE BS212 - 0.891 X 1.129 X 0.049"
55
BUT-212 - Backup PTFE BS212 - 0.891 X 1.129 X 0.049"
Product Information
Product CodeBUT-212
DescriptionBackup PTFE BS212 - 0.891 X 1.129 X 0.049"
ProfileBUT
Internal Diameter0.891
Outer Diameter1.129
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS212
BUT-118
Backup PTFE BS118 - 0.895 X 1.067 X 0.049"
53
BUT-118 - Backup PTFE BS118 - 0.895 X 1.067 X 0.049"
Product Information
Product CodeBUT-118
DescriptionBackup PTFE BS118 - 0.895 X 1.067 X 0.049"
ProfileBUT
Internal Diameter0.895
Outer Diameter1.067
Seal Height0.049
Max. Temp C260
Alt. Part No.RMS118
 
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