M4*15.5*8 for 30*30 profile short

Product description
Color Name:M4
These t slot nuts let you attach plates, brackets, and other parts to standard 30mm aluminum extrusions (with a slot opening of 8mm)
They can be inserted post-assembly by dropping them into the slot.
inserting a nut into the slot and twisting with a screw locks the nut in place.
Use to build CNC routers, 3D printers, CNC laser cutters, CNC plasma cutters, robotics projects, 3D carvers, machine guards, workstations, etc.
Note: These hammer nuts require a slot opening of 8mm to work properly. 3030 series extrusions, for example, have a smaller opening, making it impossible to drop in these nuts or twist them into place even if the nuts are slid or rolled in.