Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NPN1203 1 found under Screw Machine by Nylok Corporation. The National Stock Number assigned to this part is 5305014627413, 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 NPN1203 1.