A padlock is provided that may include a lock body and a hoop which is movable between an open position and a closed position with respect to the lock body. The lock body may include an inner housing, an outer housing and a latching mechanism for latching the hoop in the closed position. The inner housing may include a first insertion part and a second insertion part which may receive the latching mechanism to form a pre-installable module. The pre-installable module may be inserted between first and second shells of the outer housing in shape matched manner to place the padlock in a fully assembled condition.