DIFF Subgroup
F16B 33/02 Shape of thread; Special thread-forms (; used as screw-locking device F16B39/30)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Shape of thread; Special thread-forms
CPC: Shape of thread; Special thread-forms (; used as screw-locking device F16B39/30)
Full Title
Full titles differ between systems:
IPC:
Features common to bolt and nut > Shape of thread; Special thread-forms
CPC:
Features common to bolt and nut > Shape of thread; Special thread-forms (; used as screw-locking device F16B39/30)
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
Note: 1 CPC extensions are marked as secondary classification only.
Child Classifications
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