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NAS725

4th Edition, March 31, 2015

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SCREWS, MINIATURE



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Product Details:

  • Revision: 4th Edition, March 31, 2015
  • Published Date: March 31, 2015
  • Status: Active, Most Current
  • Document Language: English
  • Published By: Aerospace Industries Association (AIA/NAS)
  • Page Count: 4
  • ANSI Approved: No
  • DoD Adopted: No
  • FSC Code: 5305 - Screws

Description / Abstract:

This specification establishes the requirements for externally threaded fasteners of diameters from .30 UNM (.0118 in.) to 1.40 UNM (.0551 in.) inclusive, which fall within the classification of Miniature Screws and which are designed to be assembled with tapped holes or nuts and driven by means of a jeweler's type screwdriver. There is only one class of thread established: this is with zero allowance on all diameters. All tolerances governing limits of size are based on functions of the pitch only and apply to lengths of engagement from two-thirds to one and one-half times the nominal diameter.