The M-LOK T-Nut Replacement Set is a hardware set designed for use with all M-LOK accessories. Made of 4140 Chromoly steel with a Mil-Spec Manganese Phosphate finish, the hardware set is supplied with two different length button-head socket cap screws to ensure compatibility with various hand guards or forend thicknesses. A self-locking reusable thread patch is added to the screws to ensure a secure fit upon installation.