Quenched B$_{K}$-parameter with the Wilson and Clover actions at $\beta$ = 6.0

We present results for the Kaon B parameter from a sample of 200 configurations using the Wilson action and 460 configurations using the Clover action, on a 18^3 \times 64 lattice at \beta=6.0. A slight improvement of the chiral behaviour of B_K is observed due to the Clover action. We have also compared the results for B_K obtained from two different procedures for the boosting of the coupling constant g. We observe a strong dependence of B_K on the prescription adopted for g in the Wilson case, contrary to the results of the Clover case which are almost unaffected by the choice of g. Combining some recently obtained non perturbative estimates for the renormalisation constants with our Clover matrix element, we observe a significant improvement in the chiral behaviour of B_K.