Roll-In Spring M4 T Nut for 4040 Aluminum Extrusion, Ball-Driven Elastic T-Slot Nut for 8mm Groove Depth, Nickel-Plated Hardened Steel, Heavy-Duty Quick-Install Pack of 12

M4 Roll Ball T-Nuts for 4040 Extrusion, 12-Pack
✔️ M4 roll ball elastic nut; 8mm groove depth; nickel-plated steel; 12 pcs

These roll-in ball elastic T-nuts are designed for 40x40 aluminum extrusion profiles. They glide into the T-slot for quick, secure mounting in CNC routers, 3D printers, laser cutters, and workstations. Ideal when you need fast setup and reliable holds without extra hardware.

✅ Material: carbon steel with nickel plating for rust resistance
✅ Thread: M4, compatible with standard M4 screws
✅ Fit: standard 40x40 aluminum profile extrusion slot; groove depth around 8 mm (0.315 in)
✅ Easy roll-in installation into T-slot
✅ Uses with T-screws/hex screws; 12-pack in this set

Dimension	Metric	Imperial
Length	22 mm	0.87 in
Width	13.3 mm	0.52 in
Thickness	8.9 mm	0.35 in

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

The handy answer is that it's a quick, reliable threaded point for attaching parts to extrusion, great for DIY rigs and machine frames.

- Quick install into 40x40 T-slot - Provides a secure M4 mounting point for components - Nickel-plated carbon steel resists corrosion in shop environments - Ideal for CNC routers, 3D printers, laser cutters, and workstations