Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NASM51045-20 found under Setscrew by Bae Systems Operations Ltd. The National Stock Number assigned to this part is 5305000681655, 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 NASM51045-20.