M4 T-SLOT NUT WITH SPRING - 8mm Slot -

m4 slot To Attach Panels to Aluminium Profile Suitable for IR 5 Slot Profile

T-Slot Nut 8 St M4 from MBS Item  m4sure A T-nut, also known as tee nut specialized nuts, resembling a T in profile Suitable size T-nut are used in Aluminium T Slot Assemblies