- Author
-
U.S. Department of Commerce
- Title
- Progress Report of the National Screw Thread Commission. Authorized by Congress, July 18, 1918, H.R. 10852 as Approved June 19, 1920.
- Coporate
- Department of Commerce, Washington, DC
- Report
-
Miscellaneous Publication No. 42
January 4, 1921
110 p.
- Keywords
-
standards
|
machinery
|
fire hoses
|
wires
|
specifications
|
measuring instruments
- Identifiers
- screw threads for bolts, machine screws, nuts, tapped holes; form of thread; thread series adopted; classification and tolerances; national pipe threads
- Abstract
- The National Screw Thread Commission, which was created by an act of Congress (H.R. 10852) approved July 18, 1918, for the purpose of ascertaining and establishing standards for screw threads. for use of the various branches of the Federal Govemment and for the use of manufacturers, recommends herewith certain systems of threads, together with information, data, and specifications pertaining to the manufacture of the threads recommended. It is the desire of the commission to make available tog American manufacturers at the present time the information contained in its progress report for immediate use, rather than delay making a report in order to consider more fully the possibilities of international standardization of screw threads. It is the opinion of the comntission, however, that international standardization of screw threads is very desirable and that the present time is most opportune for accomplishments in this direction. Further reference is made to the possibilities of international standardization in Section VIII of this report. In the time provided in the act of Congress the commission has devoted its attention to the standardization of only those threads, sizes, types, and systems which are of paramount importance by reason of their extensive use and utiiity. As indicated in Section VIII, there remains much to be accomplished along the lines of standardization of special but importnt threads, and of maintaining progress in our standardization work in keeping with the developments of manufacturing conditions.