NASM-51861 Complete Document History
Screw, Tapping, Thread Forming, Type Ab, Pan Head, Cross-Recessed

Complete Current Edition:
   4TH EDITION - SCREW, TAPPING, THREAD FORMING, TYPE AB, PAN HEAD, CROSS-REC - April 29, 2016

Obsolete Revision Information:
   3RD EDITION - SCREW, TAPPING, THREAD FORMING, TYPE AB, PAN HEAD, CROSS-REC - Aug. 26, 2011
   2ND EDITION - SCREW, TAPPING-THREAD FORMING, - Feb. 1, 2002
   1ST EDITION - SCREW, TAPPING-THREAD FORMING - Feb. 1, 2001
   1999 EDITION - SCREW, TAPPING-THREAD FORMING - Nov. 1, 1999