Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 540459-004C found under Stud Self Locking by Bastogi Sistemi Spa. The National Stock Number assigned to this part is 5307009794536, and the Federal Supply Class is 5307 Studs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 540459-004C.