Non-standard screws are widely used fasteners in daily life, and rusting is a common and troublesome problem during use—it not only affects the appearance but also impairs the performance of the screws. Below are key considerations to address common issues in their use:  

1. Storage: Prevent Rust and Damage  

- Store in a dry environment to avoid rust caused by moisture, especially for electroplated or iron non-standard screws.  

- Avoid rough packaging and sorting. Use mesh bags or separate containers for screws with special requirements to prevent collisions between them.  

2. Handling: Avoid Thread and Surface Damage  

- Handle with care and avoid excessive shaking to reduce friction that may damage the product.  

- Follow the instructions on the packaging for storage and transportation. Train warehouse staff on proper handling procedures to prevent thread damage (which would cause failure in go/no-go gauge testing or inability to match nuts).  

3. Matching: Ensure Compatibility with Connectors  

- Understand the performance of matching components such as nuts and washers before use.  

- Ensure reasonable coordination between non-standard screws and their mating parts to avoid assembly issues or performance degradation.  

4. Usage: Correct Operation to Protect the Screws  

- Do not exceed the minimum breaking torque during installation to prevent screw damage.  

- Avoid damaging the anti-rust coating on the screw surface. If the coating is damaged or needs to be removed for use, reapply an anti-rust layer after assembly.  

5. Supplier Selection: Choose a Capable Manufacturer  

- Prioritize manufacturers with rich experience in customizing non-standard and special-shaped fasteners.  

- Select manufacturers that produce screws in various materials (e.g., titanium alloy, carbon steel, aluminum) and adhere to strict inspection standards for dimensions, mechanical properties, and surface defects.  

Do you want me to help you sort out a **checklist for non-standard screw use and maintenance** that you can directly refer to during storage, handling, and assembly?