BS 3643-1:2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions and symbols
4 Basic profile
5 General plan
6 Basic dimensions
7 Tolerances - Principles and basic data
8 Tolerances - Deviations for constructional threads
9 Tolerances - Limits of sizes for hot-dip galvanized
   external screw threads to mate with internal screw
   threads tapped with tolerance position H or G after
   galvanizing
10 Tolerances - Limits of sizes for internal screw threads
   to mate with hot-dip galvanized external screw threads
   with maximum size of tolerance position h before galvanizing
Annexes
Annex A (informative) - Notes for guidance
Annex B (informative) - Examples of calculations of limits of
        size for metric screw threads
Bibliography

Provides a compilation of principles and basic data for single-start, parallel screw threads having the ISO basic profile for triangular screw threads.

This part of BS3643 gives a compilation of principles and basic data for single-start, parallel screw threads having the ISO basic profile for triangular screw threads. Guidance on calculating limits of size for metric screw threads not included in Tables 1 to 14 is given in AnnexB.