Hexagon socket head shoulder screws ISO metric coarse thread ISO 7379 Material: steel 12.9 M8/10x16: 1.300 pcs. M10/12x50: 2 600 pcs. M10/12x90: 1 300 pcs. M12/16x60: 1 500 pcs. M12/16x65: 650 pcs. M12/16x80: 500 pcs. M12/16x110: 1 600 pcs. M16/20x60: 500 pcs.