Features These insert nuts are made from high carbon steel with zinc plating for durability and rust resistance Screw-in nuts have an external thread and an Allen key and are screwed in with an Allen key Insert nuts are advantageous over barrel nuts and slot nuts because they can be mounted from one side of the workpiece Screw-in nuts come in different sizes and accept different screw sizes for you to choose for your project The pre-drilled hole must be as deep as the length of the insert nut plus a portion of the screw that can be screwed into the workpiece past the end of the nut Description: A push-in nut provides a threaded socket for a wood workpiece, similar to a dowel. These insert nuts are inserted by threading them into a pre-drilled hole, in this case the outer protrusions will bite into the wood and prevent the nut from turning or pulling out. Features: These insert nuts are made from high carbon steel with zinc plating for durability and rust resistance. Screw-in nuts have an external thread and a hexagon socket drive and are screwed in with an Allen key. Slot nuts are advantageous over barrel nuts and T-nuts because they can be installed from one side of the workpiece. Screw-in nuts come in different sizes and accept different screw sizes for you to choose for your project. The pre-drilled hole must be as deep as the length of the insert nut plus the portion of the bolt that will thread past the end of the nut into the workpiece. Specifications: Material: Zinc Plated Carbon Steel Type: Screw-In Hex Socket Thread Type (Pitch): Coarse Thread Size and Quantity (Optional): M6*10mm 20pcs M6*13mm 20pcs M6*15mm 20pcs M6*17mm 20pcs M6*20mm 20pcs M6*25mm 20pcs M8*13mm 20pcs M8*15mm 20pcs M8*17mm 20pcs M8*20mm 20pcs M8*25mm 20pcs M10*25mm 20pcs Package includes: 20 x slot nuts Package List