Built for the hardest environments, this Monel 400 hexagon lock nut combines a corrosion-resistant Monel 400 (UNS N04400) nickel-copper alloy body with a Vespel polyimide insert. It is designed for higher temperature or corrosive applications where standard lock nuts quickly fail, holding locking torque in seawater, acids, alkali and elevated-temperature joints.
| Product Name | Hexagon Lock Nut with Vespel Insert |
| Body Material | Monel 400 (UNS N04400) Nickel-Copper Alloy |
| Insert Material | Vespel Polyimide Insert |
| Size Range | M3 – M24 (custom available) |
| Standard | DIN 985 / DIN 934 / ASME B18.16.6, OEM |
| Thread | Metric, UNC, UNF |
| Finish | Plain / Passivated |
| Temperature Range | Up to 260°C continuous (Vespel insert), higher intermittent |
| Locking Type | Prevailing Torque (non-metallic Vespel insert) |
Higher-temperature process equipment, chemical and petrochemical plants, marine and offshore hardware, heat exchangers, pumps and valves, oil & gas, and desalination systems.
Small MOQ available. Standard export carton and plywood case packing, or as per customer requirement. OEM / ODM service welcome.