Stainless Steel assortments are packaged in compartmented strong, clear plastic re-closable storage cases.. Kit Contains:. (8) M4 x 10 Pan Mach. Screws. (8) M4 x 20 Pan Mach. Screws. (4) M4 x 30 Pan Mach. Screws. (8) M5 x 10 Pan Mach. Screws. (8) M5 x 20 Pan Mach. Screws. (4) M5 x 30 Pan Mach. Screws. (8) M6 x 10 Pan Mach. Screws. (8) M6 x 20 Pan Mach. Screws. (4) M6 x 30 Pan Mach. Screws. (4) M6 x 40 Pan Mach. Screws. (8) M4 x 10 Flat Mach. Screws. (8) M4 x 20 Flat Mach. Screws. (4) M4 x 30 Flat Mach. Screws. (8) M5 x 10 Flat Mach. Screws. (8) M5 x 20 Flat Mach. Screws. (4) M5 x 30 Flat Mach. Screws. (8) M6 x 20 Flat Mach. Screws. (4) M6 x 30 Flat Mach. Screws. (4) M6 x 40 Flat Mach. Screws. (20) M4 Lock Nuts. (20) M5 Lock Nuts. (20) M6 Lock Nuts. (20) M4 Flat Washers. (20) M5 Flat Washers. (20) M6 Flat Washers