  Percolation and jamming phenomena are investigated for random sequential
deposition of rectangular needles on $d=2$ square lattices. Associated
thresholds $p_c^{perc}$ and $p_c^{jam}$ are determined for various needle
sizes. Their ratios $p_c^{perc} / p_c^{jam}$ are found to be a constant $0.62
\pm 0.01$ for all sizes. In addition the ratio of jamming thresholds for
respectively square blocks and needles is also found to be a constant $0.79 \pm
0.01$. These constants exhibit some universal connexion in the geometry of
jamming and percolation for both anisotropic shapes (needles versus square
lattices) and isotropic shapes (square blocks on square lattices). A universal
empirical law is proposed for all three thresholds as a function of $a$.
