Use a tube adapter when the tube is cut to length and it is not desirable to drill and tap new holes in the tubeAdapter attaches to the tube with internal set screws and provides mounting holes at the end where the tube was cut
nVent HOFFMAN SYSPEND™ S2MTA CS4 Tube Adapter, 5.51 in H x 3.94 in W x 2.76 in D, For Use With SYSPEND™ 281-MAX Suspension System, Aluminum, Black