T-Nut for 2020 for V-Slot Aluminum Extrusions (Slide in - M4 Threaded)

From the shop's description

T-slot Nuts are inserted into the aluminum profile grooves to connect one profile to another or to secure components to profile structures, allowing a clamping force for the screw in the groove. An essential for working with slotted aluminum extrusion, these slim metal nuts slide into the side-slot of the extrusion. The slightly oval shape means that as they screwed-into the nut and locked against the slot. Thread: M4 (used with M4 screws) Features Made of high-quality carbon steel, Zinc plated Finished T-Nut with M4 thread Suitable for standard 20mmx20mm aluminum profile extrusion slot Easy to be roll into T slot of aluminum profile Could be used together with T screw/hex screw