Abstract: A cam lock having an adjustable cam bolt. The cam lock has a tubular lock case, a tumbler, a shaft, a spring, and a cam bolt. The tubular lock case has an inner flange which divides the lock case into a first portion and a second portion which is formed with a restricting element. The tumbler is received in the first portion. The shaft is rotated by the tumbler and extends into the second portion. The spring is disposed around the shaft within the second portion. The cam bolt is mounted on the shaft by threaded engagement so as to compress the spring and has an arc-like cutoff beyond which the restricting element extends.