M8 Roll In T Nuts For 4040 Aluminum Extrusion Profiles 8mm Slot Pack Of 30 By Qjaiune, Half Round Tee Slot Nuts For 3D Printer And CNC Router With Secure Fit And Easy Drop In Install For European 4040 Series Extrusions

M8 Roll-In T Nuts for 4040 Aluminum Extrusion, 30-Pack
✔️ 8mm slot, 21.6×13.4×7.6mm, nickel-plated carbon steel

These M8 spring-loaded T-slot nuts fit European 4040 aluminum extrusion profiles with 8 mm slots. They drop in and lock securely thanks to a spring ball, making frame builds for 3D printers, CNC routers, and robotics projects fast and reliable.

✅ Material: 8.8 grade carbon steel, nickel plated for rust resistance
✅ Pack contains: 30 pieces; slot width 8mm; total size 21.6 x 13.4 x 7.6 mm (0.85 x 0.53 x 0.30 in)
✅ Compatibility: fits 8mm T-slots on 4040 profiles and 40mm rail systems
✅ Installation: drop-in with spring loaded ball ensures stable positioning during tightening
✅ Applications: ideal for 3D printers, CNC routers, robotics frames, industrial aluminum structures

💡 What is a T-slot nut used for in aluminum extrusion systems?

- Handy fastening for brackets, panels, and accessories to extrusion rails - Works with 8mm slots on 4040 profiles to create strong, adjustable joints - Helps prevent nut creep during tightening and under running loads