This is one of the fields with the highest requirements for spot welding technology.

• Aircraft fuselage and skin: The skin, stringers, and frames of the fuselage, wings, and tail of military aircraft and unmanned aerial vehicles (UAVs) are connected extensively using riveting-spot welding hybrid connections or pure spot welding. Welds must be strong, have good fatigue resistance, be lightweight, and not affect the aerodynamic shape.

• Aircraft engines: Used for connecting thin-walled components such as certain engine casings and heat shields.

• Missile and rocket bodies: The connection between the body shell, fuel tank, and instrument compartment requires absolute reliability under high speeds, high overloads, and severe vibration environments.

• Spacecraft cabin: The connection of some non-load-bearing structural components such as satellites and spacecraft.

• Armored Vehicle Bodies: Connecting internal non-load-bearing structural panels, bulkheads, brackets, instrument cabinets, etc. in tanks and armored personnel carriers. In composite armor, it may also be used for the initial fixing of metal layers.

• Ship Superstructures and Interior Facilities: Connecting non-watertight bulkheads, interior trim panels, equipment cabinets, pipe supports, etc. on warships. Excellent corrosion and vibration resistance is required.

• Military Electronic Equipment Chassis/Cabinets: Radar, communications equipment, command and control systems, electronic warfare equipment, etc. require high-strength electromagnetic shielding (EMI) enclosures. The covers, panels, and frames of these enclosures are typically spot welded to ensure good electrical continuity and achieve effective electromagnetic sealing.

• Circuit Boards and Components: On some high-reliability military circuit boards, the pins of large components (such as transformers and large capacitors) are spot welded rather than soldered to withstand extreme mechanical vibration and shock.

• Ammunition: Connections for various ammunition boxes and ammunition belts.

• Weapon Accessories: Attachments for certain brackets and accessories on firearms.

• Protective Equipment: Connections for certain metal components or suspension systems of body armor and helmets.