注：
A——Machined from annealed or solution annealed stock thus retaining the properties of the original material, or hot formed and solution annealed.
AF——Annealed after all threading is completed.
AH——Solution annealed and age hardened after forming.
CW——Annealed and cold worked Sizes 0.75 in. and larger may be hot worked and solution annealed.
H——Hardened and tempered at 1050°F (566℃) min.
HT——Hardened and tempered at 525°F (274℃) min.
SH——Machined from strain hardened stock.
