Measurements from two diaphragm arm springs.
Length (L) = 0.571", 0.575"
Width (W) = 0.243", 0.247"
Gap (A) = 0.130", 0.132"
Section (B) = 0.053", 0.057", 0.058"
Section (C) = 0.096", 0.098"
Thickness = 0.003"
Bend at end of spring (top of picture) = approx 0.040" to 0.050" from end, use round nose pliers for this.
David