Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PWA51790-2 found under Thumbscrew by Dff Corp. The National Stock Number assigned to this part is 5305010685294, 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 PWA51790-2.