Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BDN-109 1IN FLANGE 50PSI found under Meter Volumetric Positive Displa by Hersey Products Inc. The National Stock Number assigned to this part is 6680004807884, 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 BDN-109 1IN FLANGE 50PSI.