1,screw plugs are used where existing threaded holes need to be closed 2,Lock Nuts for closing the holes without thread. Material: Nickel-plated brassFeatures: In order to prepare the hole or extra holes doxepin, make the product attractive, waterproof, dustproof salt resistance, weak acid, alcohol, oil, grease and common solvents.Protection: IP65Circle series CODEHexagon seriesItemThread length( ...