Commonly known as cup head screws, 2205 duplex stainless steel hexagon socket head cap screws feature cylindrical heads with an internal hexagon drive hole, which can bear high tightening torque. The head can be countersunk into components to save installation space. The shank near the head is smooth, with threads only machined at the end. The duplex microstructure of 2205 provides high mechanical strength and outstanding resistance to chloride pitting, crevice corrosion and stress corrosion cracking.

Offshore platform equipment frames, auxiliary steel structures of cross-sea bridges, wind turbine cabin connections, marine chemical equipment, ship machinery, port machinery, heavy machinery connections in limited space.

1. Countersunk cylindrical head for compact installation, avoiding component interference;
2. Internal hexagon drive supports high preload torque, stable connection and vibration resistance;
3. 2205 duplex steel with excellent resistance to salt spray and chloride corrosion for marine service;
4. Smooth shank plus partial end thread, good positioning and shear resistance;
5. Large sizes from M18 to M48 available for heavy-duty long-term operation.