Bolts connecting the cable tray to the bracket use M8x25mm parachute head bolts + sliding canopy for aluminum racks and M8x40 duf head bolts for other types of racks.
The cable tray connection bolts with brackets use M8x25mm umbrella head bolts+sliding umbrella head bolts for aluminum brackets, and M8x40 double head bolts for other types of brackets
Bloom connects the cable tray to the bracket, using M8x25mm+sliding spring head sleeve for aluminum bracket and duf M8x40 head sleeve for other types of bracket.