#6 Flat Head Self-Tapping Square Drive Sheet Metal Screws. These are made from Stainless Steel 18-8 with a Type A point.Note : screw listing photo for example only. ?Diameter: ?#6 ?Thread ?Size: ?18 TPILength: ?(measured overall length)Drive: ?1S SquareMaterial: ?Stainless Steel 18-8Type: ?Sheet Metal Screw, Type A Self-TappingSystem of Measurement: ?Inch (Imperial / US)Head Diam. (Max, Min): ?Max 0.262", Min 0.238"