blank-flat-2

Part I

.020 Thk Phos Bronze Spring Temper

blank-flat-1

Part II

.045 Thk Olin 194 Extra Hard

As the material hardness increases so does the amount of twist in blanked sections of a part.
It was not possible to get the fingers of part I to line up as shown.
In part II the 7.62 finger in the base of the part was never completely flat.