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DIFF Main Group
E21B 12/00

Accessories for drilling tools

Introduced: January 1980

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 1980.

Child Classifications

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  • E21B 12/02 Wear indicators since 1980 IPC+CPC Available in IPC and CPC
  • E21B 12/04 Drill bit protectors since 1980 IPC+CPC Available in IPC and CPC
  • E21B 12/06 Mechanical cleaning devices since 1980 IPC+CPC Available in IPC and CPC