BLACK Wing Nut M3 M4 M5 M6 M8 M10 in A2 Stainless Steel Coloured Butterfly Nut
These are a DIN 315 AF. Further details are as follows Wing Nut Overall Height - 8.6mm. Wing Nut Overall Width including Wings - 17.6mm. Wing Nut Overall Height - 11mm. Wing Nut Overall Width including Wings - 22.5mm.