Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MHD1-1-2 found under Meter Volumetric Positive Displa by Hersey Products Inc. The National Stock Number assigned to this part is 6680005158208, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MHD1-1-2.