... -15mm hole:round,squar,hex, thin galvanized metal sheet Various types of patterns in a variety of materials ... ’Material Type & Thickness Hole Size & Shape Spacing & Configuration Sheet size Quantity Material Type & Thickness (Gauge) Ref No.Hole ... 8" rd3/16" stag40%22, 20, 18, 16, 14, 12, 1120, 18, 1622, 20, 18, 16,14,11.032", ... .063"..241/4" rd3/8" stag40%20, 16, 14, 12, 11, 1/4"1622, 20, 18, 16, 14, 11 ...