Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4-40UNC2A250LGNY found under Screw Machine by Usacecom Intelligence Electronic. The National Stock Number assigned to this part is 5305001379456, 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 4-40UNC2A250LGNY.