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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 $\mathrm{mm}$