ASME B18.3 pdf download Socket Cap, Shoulder, Set Screws, and Hex Keys (Inch Series) 1.1 Scope This Standard covers complete general and dimen- sional data for various types of hexagon socket cap screws, shoulder screws, set screws, and hexagon keys recognized as an American National Standard. Also included are appendices that provide specifications for hexagon socket gages and gaging, tables...