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|  MIL-H-85042A(AS)
6.5 Purpose of prestressing. In order to secure a substantial increase in
fatigue life types II, III, IX, X and XI hooks are prestressed. This benefits
the suspension hook by Cold working the plating and the outer surface of
metal, placing the surface fibers under residual compressive stress. The
prestress load is generally 60 to 85 percent of the suspension hook's ultimate
tensile strength.
6.6 Changes from previous issue. Asterisks are not used in this revision to
identify changes with respect to the previous issue due to the extensiveness
of the changes.
Preparing Activity:
Navy - AS
Project No. 1095-N166
12
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