Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number F5400-4 found under Nut Self Locking Pl by Satair A S. The National Stock Number assigned to this part is 5310009450555, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like F5400-4.