List of symbols

Symbol	Name of the symbol	Unit
$ $	bolt	$\mathrm{ }$
$A_b$	cross‐sectional area of the bolts	$\mathrm{mm^2}$
$D$	basic major diameter of internal thread (nominal diameter)	$\mathrm{mm}$
$D_1$	basic minor diameter of internal thread	$\mathrm{mm}$
$D_2$	basic pitch diameter of internal thread	$\mathrm{mm}$
$H$	height of fundamental triangle	$\mathrm{mm}$
$P$	pitch	$\mathrm{mm}$
$d$	basic major diameter of external thread (nominal diameter)	$\mathrm{mm}$
$d_1$	basic minor diameter of external thread	$\mathrm{mm}$
$d_2$	basic pitch diameter of external thread	$\mathrm{mm}$
$d_3$	basic smaller diameter of external thread	$\mathrm{mm}$