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ASME B18.6.3

13th Edition, October 11, 2013

Complete Document

Machine Screws, Tapping Screws, and Metallic Drive Screws (Inch Series)

Includes all amendments and changes through Reaffirmation Notice , 2017


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Product Details:

  • Revision: 13th Edition, October 11, 2013
  • Published Date: January 2017
  • Status: Active, Most Current
  • Document Language: English
  • Published By: ASME International (ASME)
  • Page Count: 144
  • ANSI Approved: Yes
  • DoD Adopted: Yes

Description / Abstract:

This Standard is intended to cover the complete general and dimensional data for the various types of slotted and recessed head machine screws, tapping screws, and metallic drive screws recognized as American National Standard. Also included are appendices that provide specifications and instructions for the protrusion gaging of flat countersunk head screws; across-corners gaging of hex head screws; penetration gaging and wobble gaging of recessed head screws; approximate hole size for tapping screws; wrench openings for hex and square products; thread dimensions for the No. 0000, No. 000, and No. 00 sizes; means for determining effective grip lengths on screws; documentation for screw types and head types relegated to not-recommended or limited-usage status; and formulas on which dimensional data are based. It shall be understood, however, that where questions arise concerning acceptance of product, the dimensions in the tables shall govern over recalculation by formula.

The inclusion of dimensional data in this Standard is not intended to imply that all of the products described are stock production sizes. Consumers should consult with suppliers concerning the availability of products.