Installation in thin metal ... knurled collar receives the installation force and resists torque, exhibiting spin resistance exceeding the torque that can be exerted by the self-locking feature.

The new SureLock™ B-Vent Locking System makes installations fast and foolproof. Join sections of Metal-Fab B-Vent, and twist and engage the SureLock to keep installed pipe from coming apart on the job ...