Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5338743-057 found under Screwcapsocket Head by Metric And Multistandard Components. The National Stock Number assigned to this part is 5305016969515, 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 5338743-057.