According to DIN 11024I couldn't find it, I created er to ve spring cotter pi cover every single shaft diameter according to DIN 11024 standard.- Open the part.- Narrow your selection by selecting configuration that cover your shaft diameter.- Go to EquatioManage Equatio, change value of variable "Shaft_diam" with your exact shaft diameter. Don't play with other value of diameter outside the range, part may be for other that don't use luck.