BS 328-6:1992 download free.Drills and reamers Part 6 : Countersinks , 90 @ , with parallel shanks and solid pilots.
1 Scope
BS 328-6 specifies the dimensions, in millimetres, and the tolerances of 9O countersinks with parallel shanks and sohd pilots for general use.
2 Normative reference
The following standard contains provisions which. through reference in this text. constitute provisiors of BS 328-6. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IKC and ISO maintain registers of currently valid International Standards.