When challenged with a projector mount or fixed TV mount installation in an open-ceiling scenario, this Strong™ Truss Mount Adapter for Ceiling Mounts provides the foundation necessary to connect the extension pole and get the job done quickly. It features 1.5" NPS threading for a universal fit, and includes locking set screws so you can set the pipe’s rotation and forget it. 
Strong™ Truss Mount Adapter for Ceiling Mounts
When challenged with a projector mount or fixed TV mount installation in an open-ceiling scenario, this Strong™ Truss Mount Adapter for Ceiling Mounts provides the foundation necessary to connect the extension pole and get the job done quickly. It features 1.5" NPS threading for a universal fit, and includes locking set screws so you can set the pipe’s rotation and forget it. 
Universal Fit
With 11.5 threads per inch, this suspended ceiling adapter will work with any poles using 1.5" NPS.
Multiple Applications
It works with round, square, rectangular or I-beam supports, up to 2.4" wide by 3 ½" high, using an adjustable adaptor plate for a tight, secure fit.
Locking
Includes set screws to lock down the pipe's rotation so you can set it and forget it.