The M-LOK T-Nut Replacement Set is a hardware set designed for use with all M-LOK accessories. Made of 4140 Chrome Moly 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 guard or forend thicknesses. A self-locking reusable thread patch is added to the screws to ensure a secure fit upon installation. Includes 2 T-Nuts and 4 screws, total. FeaturesQuick and easy replacement of M-LOK T-NutTwo screw sizes to fit various hand guard accessories Made in the U.S.A.