Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 66B0L55 found under Lamp Unit Vehicular by Oshkosh Corporation. The National Stock Number assigned to this part is 6220002993997, 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 66B0L55.