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BS 328-1:1959
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Drills and reamers Twist drills
Hardcopy
23-07-2013
English
14-12-1970
Dimensions, tolerances for parallel shank jobber series, stub, parallel shank long series twist drills and for Morse taper shank drills, core drills. Tables of inch and metric sizes; tables for each drill type, so that non-listed sizes may be made to standard dimensions. Dimensions for taper square shank and bit stock twist drills, etc.
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