Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SFT-4.5 1040538 found under Absorber Radio Frequency Radiati by Emerson And Cuming. The National Stock Number assigned to this part is 6625012125919, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SFT-4.5 1040538.