5 pieces of 304 stainless steel lock nuts for hexagon locking of water tank joint pipe fittings. Material and durability - Made from 304 stainless steel for durability and corrosion resistance. - Handles regular use and exposure in water system environments. Size and compatibility - Sizes include M8, M10, M12, M14, M16, M18, M20, M22, M24 x 1.5. - Includes M12 x 1.5 (S19 H4) to meet varying fitting requirements. Function and performance - Hexagon locking nuts provide a secure and reliable connection for water tank joint pipe fittings. - Designed to resist loosening and maintain tight seals over time. Convenience - 5-piece set offers a ready-to-use solution for assembling and maintaining water tank pipe systems. Use scenarios - New installation of water tank inlet/outlet joints. - Replacement of worn or damaged lock nuts on water tank piping. - Routine maintenance to ensure leak-free connections in water systems.