Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CK2078 found under Photocell Lamp by Raytheon Technical Services Company. The National Stock Number assigned to this part is 5961003510664, and the Federal Supply Class is 5961 Semiconductor Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CK2078.