Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MDL2101 0-30PSIA.01FS RS-232 found under Gage Differential Dial Indicatin by Mensor Corporation. The National Stock Number assigned to this part is 6685014452767, 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 MDL2101 0-30PSIA.01FS RS-232.