20Pcs M3 Dia 40mm Long SUS304 M3X40mm Round Cap Phillips Screw Thread Bolt This serial screws are used in the areas of electronic products, chemical industry, mechanical equipment, furniture, etc. Product Name: Stainless Steel Round Head Phillips Screw; Material: SUS304; Size: M4 * 6mm; Head Shape: Phillips Head; Product Standard: GB: Color: Silver Tone