Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 81 27121 0005 found under Switch Proximity by Man Truck And Bus Ag. The National Stock Number assigned to this part is 5930121735646, 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 81 27121 0005.