Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number COBALT-60 50 CURIES found under Radioactive Test Sample by Qsa Globalinc. The National Stock Number assigned to this part is 6665013769918, 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 COBALT-60 50 CURIES.