Packing unit: 1 TYPE: SHEET METAL SCREWS THREAD: NOT METRIC THREAD DIAMETER: 3.5MM LENGTH: 19MM HEAD: CUFFED HEAD DRIVE: PHILLIPS (PH) SURFACE: NO IMPROVEMENT MATERIAL: STAINLESS STEEL DIN: 7981 DIN EN ISO: 7049 QUALITY CATEGORY: NO QUALITY CATEGORY SEAL/WASHER: WITHOUT