Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3D100781 ITEM 19 found under Setscrew by Vacco Industries. The National Stock Number assigned to this part is 5305013157319, 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 3D100781 ITEM 19.