Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 218-27538-2 found under Light Dimmer Solid State by Triumph Aerostructures Llc. The National Stock Number assigned to this part is 6220001064692, and the Federal Supply Class is 6220 Electric Vehicular Lights And Fixtures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 218-27538-2.