#12 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: ?#12 ?Thread ?Size: ?11 TPILength: ?(measured overall length)Drive: ?3R Square RobertsonMaterial: ?Stainless Steel 18-8Type : ?Sheet Metal Screw, Type A Self-TappingSystem of Measurement: ?Inch (Imperial / US)Head Diam. (Max, Min): ?Max 0.412", Min 0.380"