List of symbols
| Symbol | Name of the symbol | Unit |
|---|---|---|
| $C_1$ | coefficient $ C_1 $ | $\mathrm{}$ |
| $C_2$ | coefficient $ C_2 $ | $\mathrm{}$ |
| $C_3$ | coefficient $ C_3 $ | $\mathrm{}$ |
| $C_4$ | coefficient $ C_4 $ | $\mathrm{}$ |
| $D$ | diameter, larger diameter | $\mathrm{mm}$ |
| $H$ | width, larger width | $\mathrm{mm}$ |
| $K_{tg}$ | stress concentration factor with the nominal stress based on gross area | $\mathrm{ }$ |
| $K_{tn}$ | stress concentration factor with the nominal stress based on net area | $\mathrm{ }$ |
| $K_{ts}$ | stress concentration factor for shear stress | $\mathrm{ }$ |
| $M$ | moment | $\mathrm{Nm}$ |
| $P$ | load, force | $\mathrm{N}$ |
| $T$ | torque | $\mathrm{Nm}$ |
| $a$ | width of a notch or semimajor axis of an ellipse | $\mathrm{mm}$ |
| $b$ | distance between notch centers or semiminor axis of an ellipse | $\mathrm{mm}$ |
| $d$ | diameter | $\mathrm{mm}$ |
| $d$ | width | $\mathrm{mm}$ |
| $h$ | thickness | $\mathrm{mm}$ |
| $r$ | radius of curvature of hole, arc, notch | $\mathrm{mm}$ |
| $t$ | depth of groove, notch | $\mathrm{mm}$ |
| $σ$ | normal stress | $\mathrm{MPa}$ |
| $σ_{max}$ | maximum normal stress | $\mathrm{MPa}$ |
| $σ_{nom}$ | nominal or reference normal stress | $\mathrm{MPa}$ |
| $τ_{max}$ | maximum shear stress | $\mathrm{MPa}$ |
| $τ_{nom}$ | nominal or reference shear stress | $\mathrm{MPa}$ |