CR = d_o
KR = 0,1Do
SF = 3,5t or per request
DH = 0,1935D_o – 0,455t
TH_i = SF + DH

D₀ = external head diameter
D_i = internal head diameter
CR = crown radius
KR = knuckle radius
SF = straight flange height
DH = depth of dishing
TH_i = total internal head height
t = wall thickness