50pcs Zinc alloy Insert Nuts, Hex Sockets Screw in Inserts Nuts Drive M4/M5/M6/M8/M10

These insert nuts are made from high quantity zinc alloy. They comes with a resealable transparent plastic box for easy storage. Screw-in insert nuts have an external thread and hex socket drive. Just screw them with a hex key wrench. The pre-drilled hole must be as deep as the length of the insert nut plus any portion of the bolt that may be screwed past the end of the nut in the work piece. Insert nuts are advantageous over barrel nuts and T-nuts, because they can be installed from one side of the workpiece. This set of screw-in insert nuts come in different sizes and take different screw sizes to meet your different needs.