This Part of BS 7371 specifies general requirements that apply to
coatings covered by all other Parts of BS 7371, including:
a) preparations before coating;
b) hydrogen embrittlement avoidance;
c) sampling for inspection;
d) thickness testing;
e) area tables for metric parallel threaded fasteners (area tables for
imperial fasteners can be found in BS 7371-12); and
f) selection of coatings (including the opportunity to select
non‑hexavalent chromium-containing coatings).
Specific requirements are given in each Part of BS 7371.