​Stainless steel hex socket cap screws can remain rust-free for many years in the atmosphere, with core materials being SUS304 and SUS316 stainless steel. For screws that comply with national standard requirements, key dimensional tolerances can be measured and verified using conventional measuring tools such as calipers. Stainless steel hex socket cap screws are a general term for a specific category; since their performance is mainly determined by the material's own performance indicators, there is no need to subdivide them into too many subcategories when introducing such products.