Diameter over screen bedding

This is the diameter below screen, sometimes called $D_1$.

Symbol
$D_{scb}$
Unit
mm
Formulae
$F_{x} \left(d_{c} + t_{2i}\right) + 2 t_{f} + 2 t_{scb}$Multi-core cables with common screen
$d_{c} + t_{2i} + 2 t_{scb}$otherwise
Used in
$A_{sc}$