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   Data updated: 06 Oct 2026. Home |  About Quick Search |  ASSIST |  ASSIST Updates Document Details

Document ID:   FED-STD-H28       Scroll down to access document images
Spec/Std Sheet:  1

Overview
Title:  Screw-Thread Standards for Federal Services Section 1 Nomenclature, Definitions and Letter Symbols for Screw Threads
Scope:  This section establishes uniform practices with regard to screw thread nomenclature and letter symbols for designating characteristics of screw threads. These are for use on drawings, in tables of dimensions which set forth dimensional standards and in other records, and for expressing mathematical relationships.
Status:  Active Document Date:  23-JAN-2025      
  Next Review Due:  22-JAN-2030
THDS Doc Category:   Federal Standard  

Responsibilities
Lead Standardization Activity:  GS  DLA Aviation - Richmond  
  Preparing Activity: GS8  DLA Aviation - Richmond
DoD Interest Level:  / Prepared by DoD activity
Coordination:  Full  
Army Custodian:  AR   US Army Combat Capabilities Development Command, Armaments Center  
Navy Custodian:  AS   Naval Air Systems Command  
DLA Custodian:  GS   DLA Aviation - Richmond  

Revision History Click on column headings for a description of column content.
MediaDocument Part DescriptionDist StmtDocument DatePagesSize
Document ImageRevision B Notice 1 - ValidationA23-JAN-202512.0 KB
Document ImageRevision B A21-APR-20204135.1 KB
Document ImageRevision A Notice 2 - ValidationA12-SEP-201912.0 KB
Document ImageRevision A Notice 1 - ValidationA12-SEP-1990135.2 KB
Document ImageRevision A A28-AUG-19856364.3 KB

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