Material: Hex connector deep nuts are made of galvanized carbon steel material, rustproof and durability for long term use. Size:M6 M8 M10 M12 M14 M16 M18 M20 Wide use: Hexagon bolts are widely used in household and office equipment, communication equipment, ship assembly and other mechanical industries. Function and use: Hexagon nuts are suitable for threaded rods, bolts, studs, machine screws, etc., suitable for indoor and outdoor use. Specially used for fixing two parts together to make them one piece. Wide Applications: joint connector nuts are used in homes, offices, shipbuilding, communications equipment, and construction machinery. threaded bar nuts are also suitable for DIY projects like furniture assembly, model making, and metal construction, meeting a variety of practical needs, such as extending screws, connecting components, or installing washers.