ISO-3293 Complete Document History
Morse taper shank countersinks for angles 60 degrees, 90 degrees and 120 degrees inclusive

Complete Current Edition:
   2ND EDITION - Morse taper shank countersinks for angles 60 degrees, 90 deg - Aug. 1, 2016

Obsolete Revision Information:
   1ST EDITION - MORSE TAPER SHANK COUNTERSINKS - July 15, 1975