Screw AZO SOL-50 5.5×22 mm — aluminum screw with stainless steel insert

AZO SOL-50 5.5×22 mm is a fastening screw that combines an aluminum body with a stainless steel insert. With a nominal size of 5.5×22 mm, this screw is designed to provide a lightweight fastening solution while maintaining corrosion resistance at the contact point where the insert is located. The mixed-material construction reduces risk of galvanic corrosion in many metal-to-metal assemblies and supports reliable mechanical joining in construction, metalwork and installation tasks.

Advantages

The aluminum outer body keeps the fastener lightweight and reduces the load on thin-sheet materials, while the stainless steel insert provides enhanced resistance to corrosion at the threaded engagement. This combination offers a balance between weight savings and durability, and the screw’s dimensions and materials make it suitable for repeated assembly and secure fastening where dissimilar metals meet. The design reduces the likelihood of thread wear and extends service life where moisture or occasional exposure to corrosive environments may occur.

Suitable for

• Assembly of lightweight structures in construction and façade elements
• Metalwork joining where mixed materials are used to limit galvanic corrosion
• Interior and exterior installations that require reduced fastener weight
• Applications where a corrosion-resistant contact surface is needed at the thread

Key specifications

• Overall size: 5.5 × 22 mm
• Body material: aluminum
• Insert material: stainless steel
• Fastener type: self-tapping/assembly screw (mechanical joining)
• Surface contact: stainless steel at threaded area for improved corrosion resistance

How to use

Select a pilot hole or pre-drilled opening appropriate for the 5.5 mm nominal diameter or follow substrate manufacturer guidance. Drive the screw using a compatible driver or bit at controlled speed and pressure to avoid stripping the aluminum outer body. Ensure the stainless steel insert engages fully with the mating component threads or insert to achieve secure mechanical fastening. For thin sheets or composite panels, use washers or backing plates if necessary to distribute load and prevent pull-through.

Usage recommendations

Choose the AZO SOL-50 5.5×22 mm when a combination of low weight and improved corrosion resistance at the threaded interface is required. Store fasteners in a dry environment and avoid prolonged direct contact with highly dissimilar metals unless isolation methods (gaskets, coatings) are used to further limit galvanic action.