Soft covered handbook titled ALLEN HEX-SOCKET SCREW HANDBOOK 1963 Edition, 112 pages,  booklet G-23-R5, Hartford, Connecticut.

Topics include:

• DIMENSION STANDARDS
• '60 SERIES SOCKET HEAD CAP SCREWS
• MECHANICAL PROPERTIES
• HEXAGON KEYS AND SOCKETS
• TIGHTENING TORQUES
• HARDNESS TESTING PROCEDURE
• SET SCREW POINTS
• DEFINITIONS
• SPECIAL SCREW DESIGN DATA
• SCREW THREAD LIMITS
• TAPS, TAP DRILL SIZES
• STAINLESS STEEL SCREWS
• ELECTROPLATED FINISHES & SURFACE TREATMENTS
• DECIMAL & METRIC EQUIVALENTS
• HARDNESS CONVERSION TABLE

This book is in VG condition,  pages clean and intact, and the binding is tight. The cover is creased and scuffed. A must have for your vintage tool collection!