Drill nomenclature and geometry

FED-STD-H28 Screw-Thread Standards for Federal Services

FED-STD-H28/1 - Nomenclature, Definitions, and Letter Symbols for Screw Threads FED-STD-H28/2 - Unified Thread Form and Thread Series for Bolts, Screws, Nuts, Tapped Holes and General Applications FED-STD-H28/3 - Unified Threads of Special Diameter, Pitches, and Lengths of Engagement FED-STD-H28/4 - Controlled Radius Root Screw Threads, UNJ ...

  Nomenclature, Fed std