Production Process of Custom Screws:
The production process of non-standard screws involves specialized manufacturing techniques tailored to specific requirements.Non-standard are typically manufactured through precision machining (CNC machining) or cold forming processes, ensuring precise dimensions and threading.
Characteristics:
Custom screws are known for their unique designs tailored to specific applications. They offer precise threading and dimensions, ensuring compatibility with corresponding nuts or components. These screws exhibit versatility in design, accommodating customized shapes, sizes, and threading configurations. 
Appearance and Shape:
The appearance and shape of custom screws can vary significantly depending on the specific design requirements and intended application. However, they typically feature a cylindrical or conical body with threads along the shaft. The head may be flat, raised, countersunk, or have other configurations to accommodate different types of tools for installation and removal. Additionally, custom screws may have specialized features such as slots, holes, or grooves to facilitate specific fastening or locking mechanisms. 
Materials:
They can be crafted from various materials such as Steel, Stainless steel, Aluminum, Brass Copper, Titanium Nickel Alloy  teel, depending on the application's demands. Material selection depends on factors such as strength, corrosion resistance, and temperature tolerance.
Usage Areas:
Non-standard screws find utility across industries like aerospace, automotive, Railway, electronics, Marine, Heavy machinery, and Construction industry where standard fasteners may not suffice due to unique specifications.They are used for fastening and securing components in assemblies, structures, and equipment.
Surface Treatment:
Custom screws may undergo surface treatments such as Plating, Coating, Passivation, Anodizing, Galvanizing, Phosphating, Blackening, Chromating, Nitriding, Oxidation coating, Zinc-Nickel plated, Dacromet,  to enhance corrosion resistance and appearance. These treatments protect the screws from rust and corrosion, ensuring longevity in various environments.
Salt Spray Test Duration:
The salt spray test duration for custom screws can vary depending on factors such as material composition and surface treatment. However, it typically ranges from 24hours to 1500hours to ensure durability in corrosive environments.