Hi Dominguez and welcome to the forum.
Get yourself a copy of "Machinery's Hand Book." You'll be glad you did.
ANSI Standards are as follows...
Type A & B Plain Washers ANSI B18.22.1-1965, R1975 (revised in 1975)
Helical Spring Lock Washers & Hi-Collar Helical Spring Lock Washers... & Internal... External Tooth Lock Washers... ANSI B18.21.1-1972