Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B4A30T040VDC found under Voltmeter by Beede Electrical Instrument Co. The National Stock Number assigned to this part is 6625003060944, 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 B4A30T040VDC.