Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS1124-4 found under Screw Close Tolerance by F And C Sales Inc. The National Stock Number assigned to this part is 5305000472346, 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 NAS1124-4.