Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6ES5-931-8MD11 found under Switch Rotary by Siemens Microelectronics Inc. The National Stock Number assigned to this part is 5930015395611, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 6ES5-931-8MD11.