Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BM 21-5LH found under Door Metal Marine Structural by Eacco Inc. The National Stock Number assigned to this part is 2040013044291, and the Federal Supply Class is 2040 Marine Hardware And Hull Items. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BM 21-5LH.