BH GSO ISO 3439:2013
ISO 3439:2003
Bahraini Standard
Current Edition
·
Approved on
17 June 2013
Subland twist drills with cylindrical shanks for holes prior to tapping screw threads
BH GSO ISO 3439:2013 Files
No files for this standard are available in the store currently.
BH GSO ISO 3439:2013 Scope
This International Standard lays down the dimensions of subland twist drills with cylindrical
shanks for holes prior to tapping screw threads.
The drills have been designed to produce holes prior to tapping metric threads (coarse pitch
series) over a selected range of M3 to M14.
This International Standard complements ISO 2306. Subland twist drills with Morse taper
shanks for holes prior to tapping screw threads are dealt with in ISO 3438.
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