Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MS21073L3 found under Nut Self Locking Plate by National Aerospace Standards. The National Stock Number assigned to this part is 5310007614221, 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 MS21073L3.