M4 T Slot Nut for 2020 Aluminum Extrusion – Drop-In / Roll-In Nut for V-Slot & T-Slot Rails | CNC, 3D Printer, Frame Assembly

Description ✅ Fits 2020 aluminum extrusions (V-slot & T-slot)✅ Accepts M4 screws (standard 4mm thread)✅ Available as drop-in or spring-loaded roll-in style✅ Made of durable zinc-plated steel or aluminum✅ Essential for any modular frame or maker build