Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 43S4380-168 found under Screw Cap Socket Head by Navair And Navsea Managed. The National Stock Number assigned to this part is 5305002740403, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 43S4380-168.