DIFF Main Group
F16B 25/00 Screws that cut thread in the body into which they are screwed, e.g. wood screws
Introduced: September 1968
Title
Titles differ between systems:
IPC: Screws that form threads in the body into which they are screwed, e.g. wood screws, self-tapping screws
CPC: Screws that cut thread in the body into which they are screwed, e.g. wood screws
Full Title
Full titles differ between systems:
IPC:
Screws that form threads in the body into which they are screwed, e.g. wood screws, self-tapping screws
CPC:
Screws that cut thread in the body into which they are screwed, e.g. wood screws
Of 8 combined children, 1 exist in both systems.
3 codes are CPC-only extensions, 4 exist only in IPC.
IPC defines codes here since 1985.
Child Classifications
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- F16B 25/02 by a cutting and material removing action, e.g. fluted self-tapping screws since 1985 IPC only IPC only
- F16B 25/04 by a slicing and material displacing action, e.g. wood screws with sharp thread crests since 1985 IPC only IPC only
- F16B 25/08 by a combination of any two or all of the actions provided for in groups since 1985 IPC only IPC only
- F16B 25/10 Screws performing an additional function to thread-forming, e.g. drill screws since 1985 +2 CPC IPC+CPC Available in IPC and CPC