Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS1191C04P4 found under Screw Cap Socket He by F And C Sales Inc. The National Stock Number assigned to this part is 5305002537955, 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 NAS1191C04P4.