True or False: Both screws pictured are for use in metal parts.

The assertion that both screws pictured are for use in metal parts is false. Generally, screws specified for metal parts are designed with specific features such as finer threads, harder materials, and coatings that are compatible with metal surfaces, ensuring durability and secure fastening. If one or both of the screws do not meet these characteristics, they are unsuitable for use with metal parts.

In firearms systems, the correct use of screws is critical for maintaining integrity and safety. Different materials require different screw types; for instance, screws designed for wood are typically coarser and do not have the same strength as those made for metal. Misapplication could lead to failure in the assembly, jeopardizing the functionality and safety of the firearm.

Thus, understanding material compatibility and fastening requirements is essential for proper inspection and repair practices in firearms maintenance.