ITEM NAME:50x M4/M5/M6/M8/M10 Zinc Alloy Hex Socket Screw-in Threaded Insert Nuts Kits yfq.M8 20mm 5pcs. M4 10mm 10pcs. M10 25mm 5pcs. An insert nut provides a threaded socket for a wooden workpiece, similar to a wall anchor. These insert nuts are inserted into a pre-drilled hole by screw in, in that case the external protrusions bite into the wood, preventing the nut from either turning or pulling out.
