Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BB12K4F found under Rectifier Semicondu by Bradley Corporation. The National Stock Number assigned to this part is 5961007933067, 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 BB12K4F.