Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MB300-815 found under Insert Screw Thread by Martin Baker Aircraft Co Ltd. The National Stock Number assigned to this part is 5325000090483, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MB300-815.