Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2031-09-656 found under Switch Rotary by Chronetics Inc. The National Stock Number assigned to this part is 5930002413654, 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 2031-09-656.