Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 99-1090387 found under Screw Rotor Compr by Nato Stock Number Assigned By An. The National Stock Number assigned to this part is 5305004687932, 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 99-1090387.