International Standard
ISO 2306:1972
Drills for use prior to tapping screw threads
Reference number
ISO 2306:1972
Edition 1
1972-07
© ISO 2024
International Standard
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Published (Edition 1, 1972)
This standard was last reviewed and confirmed in 2022. Therefore this version remains current.

ISO 2306:1972

Format
Language
CHF 42
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Abstract

Specifies the sizes of these drills for ISO metric threads (tables 1 and 2). ISO inch threads (tables 3 and 4) and pipe threads (tables 5 and 6). Applies to screw threads of normal length of engagement, the drill diamter being approximately equal to the nominal diameter of the thread minus the pitch. The sizes (except for those sizes indicated by an asterisk) have been selected from ISO 235 and are to be used in the future.

General information

  • Status
     : Published
    Publication date
     : 1972-07
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 1
    Number of pages
     : 5
  • Technical Committee :
    ISO/TC 29/SC 9
    ICS :
    25.100.30 
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