SLOTTED PAN HEAD SCREWS WITH SHOULDER according DIN 923, material steel (not stainless), with black oxide finishing. I am interesting for the next sizes: -M3 shoulder length 3mm/ 5 pieces. -M3 shoulder length 4mm/ 5 pieces. -M4 shoulder length 3mm/ 10 pieces. -M4 shoulder length 4mm/15 pieces. -M4 shoulder length 5mm/ 10 pieces. -M6 shoulder length 10mm/4 pieces. -M6 shoulder length 11mm/4 pieces.