Description / Abstract:
This SAE Information Report is provided as an advisory guide.
Careful discretion as to application is recommended. The content
has been presented as accurately as possible, but responsiblity for
its application lies with the user. It covers finishes applied to
fasteners and related topics, corrosion resistance, lubricity,
electrical grounding, ultraviolet light, and embrittlement.
Table 1 lists these coatings and their properties so that finish
selection can be reasonably made in accordance with known and
anticipated fastener assembly applications.
Application of protective coatings will affect fastener
dimensions. This is especially critical for the thread fit of
mating parts because the pitch diameter increases by four times the
coating thickness. Explanation is covered in Section 5.