GSO ISO 3438:2015
ISO 3438:2013
Gulf Standard
Current Edition
·
Approved on
03 September 2015
Subland twist drills for holes prior to tapping screw threads
GSO ISO 3438:2015 Files
English
5 Pages
Current Edition
Reference Language
USD
53.01
GSO ISO 3438:2015 Scope
This International Standard specifies the dimensions of subland twist drills with Morse taper shanks and cylindrical shanks for holes prior to tapping screw threads.
The drills are designed to produce holes prior to tapping metric threads (coarse pitch series) over a selected range of:
— M8 to M30 for subland twist drills with Morse taper shanks;
— M3 to M14 for subland twist drills with cylindrical shanks.
This International Standard complements ISO 2306.
The relationship between the symbols of this International Standard and those according to the ISO 13399 series is given for information in Annex A.
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