Thread Size: 3mm; Screw Length: 30mm (measured excluding the head height) Package Includes: 100 pcs; Hex Drive Size: 2mm Material: 304 stainless steel (A2) and no exterior finish, greater strength and corrosion resistance performance than regular stainless steel or zinc plated fasteners. Head Diameter: 5.5mm; Head Height: 2mm The clean and bright button head make it ideal uses in furnitures, 3D printer projects and other indoor or outdoor projects. Glvaner (100 pcs) M3 x 30mm Button Head Socket Cap Self Tapping Screws 304 Stainless Steel 18-8 Wood Screws Sheet Metal Screws Full Thread Coverage