TOOLCRAFT Machine Screws Allen screws 620589 - Toolcraft TO-5371923, Toolcraft TO-5371923 Allen screws feature a hex socket design and are made from stainless steel A2 for durability and resistance to corrosion. These M2.5 size screws are 6 mm in length and are available in packs of 100. Typically used in machinery assembly, these screws provide reliable fastening in precision engineering applications. Toolcraft TO-5371923 Allen Screws M2.5x6mm SS A2 Hex Socket 100pcs