DescriptionK&E Screw Selector. [Product number 4002] Screw Thread Standards for Federal Services; K&E Woodruff Key, Pipe Thread and Rivet Selector; Woodruff Key, Pipe Thread & Rivet Standards for Federal Services. Keuffel & Esser Co., Made in U.S.A. Copyright 1949 by Elemoto Sales Co.; revised Jan. 15, 1958. Plastic sleeve printed internally with multiple die-cut windows; printed cardstock slide. 4-11/16" high x 9-1/2" long. Made by Whitehead-Hoag, Newark, N.J. Screw Selector on one side and inverts for tables on the reverse regarding Drill Sizes, U.S. Standard Woodruff Keys, American Standard Pipe Thread, American Standard Rivet Heads. Slide has the revision date and has additional tables printed on it. The model number does not appear on this item. It can be found as no. 4002 on page 269 of the 42nd edition catalog of 1954. K&E had their main office and factories in Hoboken at this time. Elemoto was based in Teaneck, N.J. and had several copyrights in the 1940s for this particular chart. It was probably a stock item with customization for K&E.