Hexagon socket button head screws ISO 7380-2 ( with collar ) 10.9 zinc plating baked M5x16 Please quote for 300 000 pcs. and 650 000 pcs. Hexagon socket button head screws ISO 7380-2 ( with collar ) TORX 10.9 zinc plating baked M5x16 Please quote for 300 000 pcs. and 650 000 pcs. Please, only European suppliers