Abstract: A pipe clamp with a band and a worm drive mechanism that provides a fluid-tight seal at a joint involving one or more metal pipes. The worm drive mechanism includes a screw and a housing. The housing has an end wall located opposite a head of the screw. The end wall at least partially encloses a terminal end portion of the screw. Surface-to-surface abutment between the terminal end portion and the end wall during tightening precludes deformation of the housing that might otherwise be experienced.