The function methods of hexagonal socket cap screws are numerous, especially for the internal hexagonal hex socket cap screws, which are commonly used for assembling plastic parts.Please provide the Chinese content you would like translated into American English.Common fasteners, suitable for both permanent assemblies and for fixing components that are frequently repaired or replaced.

Hexagonal drilled nuts are used with bolts and screws for connecting and securing machine parts. The Type 1 six-way nuts are widely applied, while C-grade nuts are used on machinery, equipment, or structures with rough surfaces and lower precision requirements; A-grade and B-grade nuts are used on machinery, equipment, or structures with smooth surfaces and higher precision requirements. The thickness M of the Type 2 hexagonal drilled nuts is thicker, and they are often used in situations where frequent assembly and disassembly is needed.