Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number STBF34K5 found under Ring Retaining by The Boeing Company. The National Stock Number assigned to this part is 5325008243279, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like STBF34K5.