Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NAS1191E04P4LK found under Screw Cap Socket Head by Sps Technologies Inc. The National Stock Number assigned to this part is 5305001449844, 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 NAS1191E04P4LK.