Chart for determining the helix angles of screw threads.
Subtitle: Showing helix angles for diameters from 0.05 to 10 inches and threads per inch from 1 to 100
By: by I. H. Fullmer.
Series: Miscellaneous publications -- no. 109; Miscellaneous publications (United States. Bureau of Standards) -- no. 109.
Publisher: U.S. Govt. print. off.
Published: 1930
Place of publication: [Washington]
Language: eng
Subjects: Screw-threads.
Notes: At head of title: U.S. Department of commerce. R. P. Lamont, secretary. Bureau of standards. George K. Burgess, director.

"Issued March 7, 1930."