BS-1769 › Complete Document History
Specification. Unified black hexagon bolts, screws, nuts (UNC and UNF threads). Heavy series


Obsolete Revision Information:
   AMD 1645 - AMENDMENT 4 - Jan. 1, 1975
   AMD 692 - AMENDMENT 3 - Feb. 1, 1971
   PD 2788 - AMENDMENT 2 - May 1, 1957
   PD 2141 - AMENDMENT 1 - March 1, 1955
   1951 EDITION - REAFFIRMED IN 2013 - Sept. 24, 1951