Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SFB4039 found under Semiconductor Devices Unitized by Halliburton Services. The National Stock Number assigned to this part is 5961007907892, 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 SFB4039.