Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MB300-684 found under Connection Parachute by Martin Baker America Inc. The National Stock Number assigned to this part is 1670000049945, and the Federal Supply Class is 1670 Parachutes Aerial Pick Up Delivery Recovery Systems And Cargo Tie Down Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MB300-684.