DIN 7504 K Self-drilling screws, hexagon washer head with tapping Zinc-plated steel 500000 pcs. 4,2x16 (Drill capacity 2,5+2,0mm) 150000 pcs. 4,8x70 (Drill capacity 1,0+2,0mm) 100000 pcs. 6,3x120 (Drill capacity 1,0+2,0mm)