CA21 | 520PC MACHINE SCREWS AND NUTS ASSORTMENT Metric Pan Head Phillips Zinc Plated. 12 Sizes: 3mm to 6mm x 10mm to 25mm Long 520 Pieces Replacement Packs Available Part # Size Pack Qty C21-1 M3 x 10mm 20 C21-2 M3 x 16mm 20 C21-3 M3 x 23mm 20 C21-4 M4 x 10mm 20 C21-5 M4 x 16mm 20 C21-6 M4 x 20mm 20 C21-7 M5 x 10mm 20 C21-8 M5 x 16mm 20 C21-9 M5 x 20mm 20 C21-10 M5 x 25mm 20 C21-11 M6 x 16mm 30 C21-12 M6 x 20mm 30 C21-13 M3 x 0.5 Nuts 60 C21-14 M4 x 0.7 Nuts 60 C21-15 M5 x 0.8 Nuts 80 C21-16 M6 x 1.00 Nuts 60