Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X2-1187-202B found under Switch Rotary by Ronan Engineering Company. The National Stock Number assigned to this part is 5930014149849, 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 X2-1187-202B.